CN116798801B - Vacuum circuit breaker - Google Patents
Vacuum circuit breaker Download PDFInfo
- Publication number
- CN116798801B CN116798801B CN202310935037.2A CN202310935037A CN116798801B CN 116798801 B CN116798801 B CN 116798801B CN 202310935037 A CN202310935037 A CN 202310935037A CN 116798801 B CN116798801 B CN 116798801B
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- Prior art keywords
- main shaft
- supporting seat
- hole
- groove
- vacuum tube
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052802 copper Inorganic materials 0.000 claims abstract description 20
- 239000010949 copper Substances 0.000 claims abstract description 20
- 238000005096 rolling process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 9
- 230000009471 action Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
Classifications
-
- 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
- H01H33/6606—Terminal arrangements
-
- 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
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention discloses a vacuum circuit breaker, which comprises a switch bracket, an operation main shaft and a three-phase assembly arranged on the switch bracket, wherein the three-phase assembly comprises a vacuum tube, a movable rod connecting piece connected with a movable rod of the vacuum tube and a main shaft crank arm which is arranged on the operation main shaft in a linkage way and used for driving the movable rod connecting piece to move; the three-phase assembly further comprises a main shaft supporting seat and a vacuum tube wiring board, wherein the main shaft supporting seat is arranged on the switch support, a through hole for the operation main shaft to pass through is formed in the main shaft supporting seat, the vacuum tube wiring board comprises a copper bar flexible connection, and a first connecting part and a second connecting part which are arranged at two ends of the copper bar flexible connection, the first connecting part is arranged on the movable rod connecting piece, and the second connecting part is connected on the main shaft supporting seat. The conductive sheet has stable and reliable connection structure and small occupied space, and is worth popularizing.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a vacuum circuit breaker.
Background
The vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; the arc extinguishing device has the advantages of small volume, light weight, suitability for frequent operation and no maintenance in arc extinguishing, and is more popular in power distribution networks.
The existing vacuum circuit breaker generally comprises a switch bracket, an operation main shaft and a three-phase assembly arranged on the switch bracket, wherein the three-phase assembly comprises a vacuum tube, a movable rod connecting piece connected with a movable rod of the vacuum tube and a main shaft crank arm which is installed on the operation main shaft in a linkage manner and used for driving the movable rod connecting piece to move, and the movable rod connecting piece is provided with a vacuum tube wiring board. Most of the vacuum tube wiring boards on the market at present are upright conducting strip structures, and the connecting structures of the vacuum tube wiring boards not only occupy large space, but also are unstable in connection, so that improvement of the structures is needed.
Disclosure of Invention
The invention aims to provide a vacuum circuit breaker, and the conducting strip is stable and reliable in connection structure, small in occupied space and worthy of being popularized greatly.
In order to achieve the above purpose, the present invention provides the following technical solutions: the vacuum circuit breaker comprises a switch bracket, an operation main shaft and a three-phase assembly arranged on the switch bracket, wherein the three-phase assembly comprises a vacuum tube, a movable rod connecting piece connected with a movable rod of the vacuum tube and a main shaft crank arm which is installed on the operation main shaft in a linkage manner and used for driving the movable rod connecting piece to move; the three-phase assembly further comprises a main shaft supporting seat and a vacuum tube wiring board, wherein the main shaft supporting seat is arranged on the switch support, a through hole for the operation main shaft to pass through is formed in the main shaft supporting seat, the vacuum tube wiring board comprises a copper bar flexible connection, and a first connecting part and a second connecting part which are arranged at two ends of the copper bar flexible connection, the first connecting part is arranged on the movable rod connecting piece, and the second connecting part is connected on the main shaft supporting seat.
Through adopting above-mentioned technical scheme, the vacuum tube wiring board has the structure of copper bar flexible coupling, during the installation, connects the first connecting portion of vacuum tube wiring board on moving the pole connecting piece earlier, then crooked copper bar flexible coupling again, laminates and connects second connecting portion and main shaft supporting seat, compares in the upright conducting strip structure among the prior art, and it has connection structure reliable and stable and advantage that occupation space is little, is worth carrying out the powerful popularization.
The invention is further characterized in that the spindle support seat is provided with a binding post, the binding post is provided with a screw hole, and the second connecting part is provided with a through hole corresponding to the screw hole.
Through adopting above-mentioned technical scheme, aim at the screw on the terminal with the through-hole on the second connecting portion, pass the through-hole on the second connecting portion with the screw on the screw of screw in terminal again, realize the connection of second connecting portion and terminal.
The invention further provides that the main shaft support comprises a support base main body and a first connecting arm arranged on the support base main body, the first connecting arm is connected with the switch bracket through a fastener, the through hole is formed in the support base main body, and the binding post is arranged on the first connecting arm.
By adopting the technical scheme, the connecting structure is stable and reliable.
The invention is further characterized in that a copper sleeve is arranged on the inner wall of the through hole of the main shaft supporting seat, and the copper sleeve is sleeved on the periphery of the operation main shaft.
By adopting the technical scheme, the friction between the operation main shaft and the through hole on the main shaft supporting seat can be reduced, and the effect of protecting the main shaft supporting seat is achieved.
The invention is further characterized in that three insulating sleeves are arranged on the switch bracket, the insulating sleeves are sleeved on the peripheries of the corresponding movable rod connecting pieces, the end parts of the first connecting arms are connected to the inner sides of the corresponding insulating sleeves, and the insulating sleeves are also provided with through holes for the vacuum tube wiring boards to pass through.
By adopting the technical scheme, the insulation effect is achieved, and various short-circuit faults and grounding safety accidents of mechanical equipment caused by the fact that small animals touch the naked dew point by mistake are avoided.
The invention is further characterized in that a plurality of insulating ribs are arranged on the periphery of the insulating sleeve along the axial direction.
Through adopting above-mentioned technical scheme, set up a plurality of insulating muscle and not only increased the area of contact of insulating cover with the air to play the effect that promotes the radiating effect, can promote creepage distance moreover, have higher security performance.
The invention is further characterized in that the insulating sleeve is provided with an insulating plate extending vertically at the position corresponding to the left side and the right side of the vacuum tube wiring board.
Through adopting above-mentioned technical scheme, shelter from vacuum tube wiring board both sides, can further promote the insulating effect of insulating cover.
The invention is further arranged that a polygonal linkage hole is arranged on the first connecting part, and a polygonal linkage part which is matched with the polygonal linkage hole is arranged on the movable rod connecting piece; the periphery of the movable rod connecting piece is also provided with a limiting convex edge, one side of the first connecting part is propped against the limiting convex edge, and the other side of the first connecting part is propped against the end part of the vacuum tube.
Through adopting above-mentioned technical scheme, realize the location installation of the first connecting portion of vacuum tube wiring board, and connection structure is simple reliable, and the dismouting is very convenient.
The invention is further arranged that the main shaft supporting seat also comprises a second connecting arm arranged on the supporting seat main body, and the second connecting arm is connected with the switch bracket through a fastener; the second connecting arm is provided with a clamping table, a positioning assembly and a safety assembly;
the clamping table and the second connecting arm are of an integrated structure, and one side of the clamping table is provided with a clamping channel for inserting the second connecting part;
The positioning assembly comprises a positioning needle, a first spring and a screw plug, a thread groove is vertically formed in the clamping table, a first guide hole is formed in the inner end of the thread groove, the first guide hole is communicated with the clamping channel, and a yielding groove coaxial with the first guide hole is formed in the other side, opposite to the first guide hole, of the clamping channel; the positioning needle penetrates through the first guide hole, one end of the positioning needle is provided with a limiting flange extending towards the periphery, the screw plug is connected to the thread groove in a threaded mode, the first spring is clamped between the screw plug and the positioning needle, the limiting flange is abutted against the inner end of the thread groove, the other end of the positioning needle is provided with a conical part of which part extends into the abdicating groove, and the positioning needle positions the second connecting part when inserted into the through hole of the second connecting part;
The safety assembly comprises a knob, a limit screw, a locking needle and a second spring, wherein a rotating groove, a sliding groove and a second guide hole which are communicated with each other are sequentially formed in the side part of the clamping table from outside to inside, and the second guide hole is communicated with the first guide hole; the rotary knob is rotationally arranged on the rotary groove, a first annular limit groove is formed in the outer side of the rotary knob along the circumferential direction, the limit screw is in threaded connection with the clamping table, the screw rod part of the limit screw stretches into the first annular limit groove, the locking needle penetrates through the second guide hole, a sliding part matched with the sliding groove is arranged at the position of the locking needle in the sliding groove, one end of the second spring is propped against the inner end of the sliding groove, the other end of the second spring is propped against the sliding part, a plurality of guide grooves extending along the axial direction are formed in the sliding groove, and a plurality of guide protrusions matched with the guide grooves are arranged on the sliding part; a plurality of first arc-shaped convex parts are distributed at one end of the guide part, which is close to the knob, in a circumferential array, a first arc-shaped concave part is formed between every two adjacent first arc-shaped convex parts, a plurality of second arc-shaped convex parts matched with the first arc-shaped concave parts are distributed at the inner end of the knob in a circumferential array, a second arc-shaped concave part is formed between every two second arc-shaped convex parts, and a first positioning concave part for sliding in the middle of the first arc-shaped convex parts is arranged at the convex part of the first arc-shaped convex parts; the positioning needle is circumferentially provided with a second annular limiting groove, and the end part of the locking needle is inserted into or separated from the second annular limiting groove when the locking needle circumferentially slides.
By adopting the technical scheme, another connection mode is provided for the vacuum tube wiring board, other tools are not needed in the later maintenance process of the wiring structure, namely, when wiring is carried out, the second installation part of the vacuum tube wiring board slides into the clamping channel of the clamping table, the positioning needle of the positioning assembly retracts against the spring force of the first spring under the pushing of the second installation part, so that the second installation part smoothly slides into the clamping channel until the positioning needle coincides with the projection of the through hole of the second connection part, and the positioning needle is inserted into the corresponding through hole to position the second connection part; in order to prevent the second connecting part from loosening under the action of external force, the locking needle of the safety component is propped in the second annular limiting groove of the positioning needle, so that the positioning needle is prevented from retracting under the action of external force, and the second connecting part is prevented from loosening; when the locking needle is disassembled, only the knob is required to be rotated, the state that the second arc convex part on the knob is propped against the first arc convex part on the locking needle is changed into the state that the second arc convex part on the knob is matched with the first arc concave part on the locking needle, namely, the locking needle is retracted until the end part of the locking needle is completely separated from the second annular limiting groove on the positioning needle, at the moment, the second installation part is pulled, the positioning needle can be retracted smoothly under the action of external force, the second installation part is pulled out, the disassembly and the power failure of the locking needle are realized, and the operation is very convenient.
The invention is further arranged that rolling bearings are respectively arranged at the two sides of the clamping table corresponding to the upper part and the lower part of the clamping channel through bolts.
Through adopting above-mentioned technical scheme, the antifriction bearing of both sides not only can press from both sides tight second installation department, and its rolling fit's mode greatly reduced the frictional resistance who produces when contacting with second installation department moreover, plays protection second installation department and the effect of being convenient for tear open and change.
Drawings
FIG. 1 is a schematic overall structure of embodiment 1;
FIG. 2 is a schematic view of the structure of embodiment 1 with the switch bracket removed entirely;
FIG. 3 is a partial cross-sectional view of example 1;
Fig. 4 is a schematic structural diagram of a spindle support according to embodiment 1;
Fig. 5 is a schematic structural diagram of a switch bracket in embodiment 1;
fig. 6 is a schematic structural view of a vacuum tube wiring board of embodiment 1;
FIG. 7 is a schematic overall structure of embodiment 2;
Fig. 8 is a schematic structural diagram of a spindle support according to embodiment 2;
FIG. 9 is a top view of a spindle carrier according to example 2;
FIG. 10 is a cross-sectional view A-A of FIG. 9;
FIG. 11 is an enlarged schematic view of the clamping table, positioning assembly and safety assembly of FIG. 10;
FIG. 12 is a schematic view showing the structure of a knob according to embodiment 2;
FIG. 13 is a schematic view showing the structure of a locking needle of embodiment 2;
FIG. 14 is a schematic view showing a first engagement state of the knob and the locking pin according to embodiment 2;
fig. 15 is a schematic view showing a second engagement state of the knob and the locking pin according to embodiment 2.
In the figure: 1. a switch bracket; 2. operating the main shaft; 3. a three-phase assembly; 4. a vacuum tube; 5. a movable rod connecting piece; 6. a main shaft crank arm; 7. a main shaft support seat; 8. a vacuum tube wiring board; 9. a via hole; 10. copper bar flexible connection; 11. a first connection portion; 12. a second connecting portion; 13. binding posts; 14. a screw hole; 15. a through hole; 16. a support base main body; 17. a first connecting arm; 18. a copper sleeve; 19. an insulating sleeve; 20. crossing; 21. an insulating rib; 22. an insulating plate; 23. a polygonal linkage hole; 24. a polygonal linkage part; 25. a limit convex edge; 26. a second connecting arm; 27. clamping table; 28. a positioning assembly; 29. a safety component; 30. clamping the channel; 31. a positioning needle; 32. a first spring; 33. a screw plug; 34. a thread groove; 35. a first guide hole; 36. a relief groove; 38. a limit flange; 39. a tapered portion; 40. a knob; 41. a limit screw; 42. a locking needle; 43. a second spring; 44. a rotating groove; 45. a sliding groove; 46. a second guide hole; 47. the first annular limiting groove; 48. a sliding part; 49. a guide groove; 50. a guide protrusion; 51. a first arcuate projection; 52. a first arcuate recess; 53. a second arcuate projection; 54. a second arcuate recess; 55. a first positioning recess; 56. the second annular limiting groove; 57. a rolling bearing.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1: the vacuum circuit breaker as shown in fig. 1-6 comprises a switch bracket 1, an operation main shaft 2 and a three-phase assembly 3 arranged on the switch bracket 1, wherein the three-phase assembly 3 comprises a vacuum tube 4, a movable rod connecting piece 5 connected with a movable rod of the vacuum tube 4 and a main shaft crank arm 6 which is arranged on the operation main shaft 2 in a linkage manner and used for driving the movable rod connecting piece 5 to move, namely the vacuum tube 4, the movable rod connecting piece 5 and the main shaft crank arm 6 are provided with three groups; the three-phase assembly 3 further comprises a main shaft supporting seat 7 and a vacuum tube wiring board 8, the main shaft supporting seat 7 is installed on the switch bracket 1, a through hole 9 used for the operation main shaft 2 to pass through is formed in the main shaft supporting seat 7, the vacuum tube wiring board 8 comprises a copper bar flexible connection 10, and a first connecting portion 11 and a second connecting portion 12 which are arranged at two ends of the copper bar flexible connection 10, the first connecting portion 11 is installed on the movable rod connecting piece 5, and the second connecting portion 12 is connected to the main shaft supporting seat 7. The vacuum tube wiring board 8 has the structure of copper bar flexible coupling 10, and during the installation, first connecting portion 11 with vacuum tube wiring board 8 connects on movable rod connecting piece 5 earlier, then crooked copper bar flexible coupling 10, with second connecting portion 12 and main shaft supporting seat 7 laminating and connection, compare in the upright conducting strip structure in prior art, it has connection structure reliable and stable and advantage that occupation space is little, is worth carrying out the powerful popularization.
As shown in fig. 1, the spindle support 7 is integrally provided with a binding post 13, the binding post 13 is provided with a screw hole 14, and the second connecting portion 12 is provided with a through hole 15 corresponding to the screw hole 14. The through hole 15 on the second connecting part 12 is aligned with the screw hole 14 on the binding post 13, and then a screw is threaded through the through hole 15 on the second connecting part 12 and screwed into the screw hole 14 on the binding post 13, so that the second connecting part 12 is connected with the binding post 13.
As shown in fig. 1 and fig. 4, the spindle supporting seat 7 includes a supporting seat main body 16 and a first connecting arm 17 disposed on the supporting seat main body 16, the first connecting arm 17 is connected with the switch bracket 1 through a fastener, which may be a screw, and the via hole 9 is formed on the supporting seat main body 16. The connecting structure is stable and reliable.
In the present embodiment, the number of the posts 13 may be set to two, the number of the first connecting arms 17 is also set to two, and the two posts 13 are respectively provided on the two first connecting arms 17. The main shaft supporting seat 7 has a symmetrical structure, and can be installed in two directions, so that the earlier assembly operation is greatly facilitated.
As shown in fig. 3, a copper sleeve 18 is mounted on the inner wall of the through hole 9 of the spindle support 7, and the copper sleeve 18 is sleeved on the outer periphery of the operating spindle 2. The design can reduce friction between the operation main shaft 2 and the through hole 9 on the main shaft supporting seat 7, and has the effect of protecting the main shaft supporting seat 7.
As shown in fig. 1 and fig. 5, the switch bracket 1 is provided with three insulating sleeves 19, the insulating sleeves 19 and the switch bracket 1 are in an integrated structure, the insulating sleeves 19 are sleeved on the peripheries of the corresponding movable rod connecting pieces 5, the end parts of the first connecting arms 17 are connected to the inner sides of the corresponding insulating sleeves 19, the insulating sleeves 19 are also provided with through holes 20 for the vacuum tube wiring boards 8 to pass through, and the through holes 20 are in a rectangular structure. The insulating sleeve 19 plays an insulating role, and avoids various short-circuit faults and grounding safety accidents of mechanical equipment caused by the fact that small animals touch the bare dew point by mistake.
As shown in fig. 5, a plurality of insulating ribs 21 are provided on the outer periphery of the insulating sleeve 19 in the axial direction. The plurality of insulating ribs 21 not only increase the contact area between the insulating sleeve 19 and the air, thereby playing the role of improving the heat dissipation effect, but also improving the creepage distance and having higher safety performance.
As shown in fig. 5, the insulating sleeves 19 are respectively provided with an insulating plate 22 extending vertically at positions corresponding to the left side and the right side of the vacuum tube wiring board 8. Shielding the two sides of the vacuum tube wiring board 8 can further improve the insulation effect of the insulation sleeve 19.
As shown in fig. 3 and fig. 6, the first connecting portion 11 is provided with a polygonal linkage hole 23, the movable rod connecting member 5 is provided with a polygonal linkage portion 24 which is matched with the polygonal linkage hole 23, and more specifically, the polygonal linkage hole 23 and the polygonal linkage portion 24 are in a square cross section; the periphery of the movable rod connecting piece 5 is also provided with a limiting convex edge 25, one side of the first connecting part 11 is propped against the limiting convex edge 25, and the other side of the first connecting part 11 is propped against the end part of the vacuum tube 4. The positioning and mounting of the first connecting part 11 of the vacuum tube wiring board 8 are realized through the design, and the connecting structure is simple and reliable, and the disassembly and assembly are very convenient.
Example 2: as shown in fig. 7 to 15, unlike the structure of embodiment 1, the spindle supporting base 7 further includes a second connecting arm 26 disposed on the supporting base main body 16, the second connecting arm 26 is connected to the switch bracket 1 by a fastener, and the supporting base main body 16 is provided with a first connecting arm 17 and a second connecting arm 26; the two connecting arms respectively provide a connecting mode, and the specific structure is described below;
the second connecting arm 26 is provided with a clamping table 27, a positioning assembly 28 and a safety assembly 29;
The clamping table 27 and the second connecting arm 26 are of an integrated structure, and a clamping channel 30 for inserting the second connecting portion 12 is arranged on one side of the clamping table 27;
The positioning assembly 28 comprises a positioning needle 31, a first spring 32 and a screw plug 33, a thread groove 34 is vertically formed in the clamping table 27, a first guide hole 35 is formed in the inner end of the thread groove 34, the first guide hole 35 is communicated with the clamping channel 30, and a yielding groove 36 coaxial with the first guide hole 35 is formed in the clamping channel 30 at the other side of the clamping channel 30 opposite to the first guide hole 35; the positioning needle 31 penetrates through the first guide hole 35, one end of the positioning needle 31 is provided with a limiting flange 38 extending towards the periphery, the screw plug 33 is connected to the screw groove 34 in a threaded manner, the first spring 32 is clamped between the screw plug 33 and the positioning needle 31, the limiting flange 38 is abutted against the inner end of the screw groove 34, the other end of the positioning needle 31 is provided with a conical part 39 which partially stretches into the abdicating groove 36, and the positioning needle 31 positions the second connecting part 12 when being inserted into the through hole 15 of the second connecting part 12;
The safety assembly 29 comprises a knob 40, a limit screw 41, a locking pin 42 and a second spring 43, wherein a rotating groove 44, a sliding groove 45 and a second guide hole 46 which are communicated with each other are sequentially formed in the side part of the clamping table 27 from outside to inside, and the second guide hole 46 is communicated with the first guide hole 35; the knob 40 is rotatably arranged on the rotating groove 44, a first annular limiting groove 47 is formed in the outer side of the knob 40 along the circumferential direction, the limiting screw 41 is in threaded connection with the clamping table 27, a screw rod portion of the limiting screw 41 extends into the first annular limiting groove 47, the locking needle 42 penetrates through the second guide hole 46, a sliding portion 48 matched with the sliding groove 45 is formed in the position, located in the sliding groove 45, of the locking needle 42, one end of the second spring 43 abuts against the inner end of the sliding groove 45, the other end of the second spring 43 abuts against the sliding portion 48, a plurality of guide grooves 49 extending along the axial direction are formed in the sliding groove 45, and a plurality of guide protrusions 50 matched with the guide grooves 49 are formed in the sliding portion 48; a plurality of first arc-shaped convex parts 51 are distributed at one end of the guide part, which is close to the knob 40, in a circumferential array, a first arc-shaped concave part 52 is formed between every two adjacent first arc-shaped convex parts 51, a plurality of second arc-shaped convex parts 53 matched with the first arc-shaped concave parts 52 are distributed at the inner end of the knob 40 in a circumferential array, a second arc-shaped concave part 54 is formed between every two second arc-shaped convex parts 53, and a first positioning concave part 55 for sliding in the corresponding first arc-shaped convex parts 51 is arranged at the convex part in the middle of the first arc-shaped convex parts 51; the positioning needle 31 is provided with a second annular limiting groove 56 along the circumferential direction, and the end part of the locking needle 42 is inserted into or separated from the second annular limiting groove 56 when sliding along the circumferential direction.
The structure provides another connection mode for the wiring board of the vacuum tube 4, other tools are not needed in the later maintenance process of the wiring structure, namely, during wiring, the second installation part of the wiring board of the vacuum tube 4 slides into the clamping channel 30 of the clamping table 27, the positioning needle 31 of the positioning assembly 28 is retracted against the spring force of the first spring 32 under the pushing of the second installation part, so that the second installation part smoothly slides into the clamping channel 30 until the positioning needle 31 is overlapped with the projection of the through hole 15 of the second connection part 12, and the positioning needle 31 is inserted into the corresponding through hole 15 to realize the positioning of the second connection part 12; in order to prevent the second connection portion 12 from being released by external force, the locking needle 42 of the safety component 29 is propped against the second annular limiting groove 56 of the positioning needle 31, so that the positioning needle 31 is prevented from being retracted by external force, and the second connection portion 12 is prevented from being released; when the rotary knob 40 is removed, the state that the second arc-shaped convex part 53 on the rotary knob 40 is propped against the first arc-shaped convex part 51 on the locking needle 42 is changed into the state that the second arc-shaped convex part 53 on the rotary knob 40 is matched with the first arc-shaped concave part 52 on the locking needle 42, namely, the locking needle 42 is retracted until the end part of the locking needle is completely separated from the second annular limiting groove 56 on the positioning needle 31, the second installation part is pulled at the moment, the positioning needle 31 can be retracted smoothly under the action of external force, the second installation part is pulled out, the disassembly and outage of the positioning needle is realized, and the operation is very convenient.
As shown in fig. 8, rolling bearings 57 are respectively mounted on the two sides of the clamping table 27 corresponding to the upper and lower positions of the clamping channel 30 through bolts, that is, two rolling bearings 57 on each side are respectively arranged up and down. The rolling bearings 57 on both sides can not only clamp the second mounting portion, but also greatly reduce frictional resistance generated when in contact with the second mounting portion in a rolling fit manner, thereby protecting the second mounting portion and facilitating disassembly and rotation.
Claims (6)
1. The vacuum circuit breaker comprises a switch bracket (1), an operation main shaft (2) and a three-phase assembly (3) arranged on the switch bracket (1), wherein the three-phase assembly (3) comprises a vacuum tube (4), a movable rod connecting piece (5) connected with a movable rod of the vacuum tube (4) and a main shaft crank arm (6) which is arranged on the operation main shaft (2) in a linkage way and is used for driving the movable rod connecting piece (5) to move; the method is characterized in that: the three-phase assembly (3) further comprises a main shaft supporting seat (7) and a vacuum tube wiring board (8), the main shaft supporting seat (7) is arranged on the switch bracket (1), a through hole (9) for a main shaft (2) to pass through is formed in the main shaft supporting seat (7), the vacuum tube wiring board (8) comprises a copper bar flexible connection (10) and a first connecting part (11) and a second connecting part (12) which are arranged at two ends of the copper bar flexible connection (10), the first connecting part (11) is arranged on the movable rod connecting piece (5), and the second connecting part (12) is connected to the main shaft supporting seat (7);
A binding post (13) is arranged on the main shaft supporting seat (7), a screw hole (14) is arranged on the binding post (13), and a through hole (15) corresponding to the screw hole (14) is arranged on the second connecting part (12);
The main shaft supporting seat (7) comprises a supporting seat main body (16) and a first connecting arm (17) arranged on the supporting seat main body (16), the first connecting arm (17) is connected with the switch bracket (1) through a fastener, the through hole (9) is formed in the supporting seat main body (16), and the binding post (13) is arranged on the first connecting arm (17);
A copper sleeve (18) is arranged on the inner wall of the through hole (9) of the main shaft supporting seat (7), and the copper sleeve (18) is sleeved on the periphery of the operation main shaft (2);
The main shaft supporting seat (7) further comprises a second connecting arm (26) arranged on the supporting seat main body (16), and the second connecting arm (26) is connected with the switch bracket (1) through a fastener; the second connecting arm (26) is provided with a clamping table (27), a positioning assembly (28) and a safety assembly (29);
The clamping table (27) and the second connecting arm (26) are of an integrated structure, and a clamping channel (30) for inserting the second connecting part (12) is formed in one side of the clamping table (27);
The positioning assembly (28) comprises a positioning needle (31), a first spring (32) and a screw plug (33), a thread groove (34) is formed in the clamping table (27) along the vertical direction, a first guide hole (35) is formed in the inner end of the thread groove (34), the first guide hole (35) is communicated with the clamping channel (30), and a yielding groove (36) coaxial with the first guide hole (35) is formed in the other side, opposite to the first guide hole (35), of the clamping channel (30); the positioning needle (31) penetrates through the first guide hole (35), one end of the positioning needle (31) is provided with a limiting flange (38) extending towards the periphery, the screw plug (33) is connected to the screw groove (34) in a threaded mode, the first spring (32) is clamped between the screw plug (33) and the positioning needle (31) so that the limiting flange (38) abuts against the inner end of the screw groove (34), the other end of the positioning needle (31) is provided with a conical part (39) of which a part extends into the abdicating groove (36), and the positioning needle (31) positions the second connecting part (12) when being inserted into the through hole (15) of the second connecting part (12);
The safety assembly (29) comprises a knob (40), a limit screw (41), a locking needle (42) and a second spring (43), a rotating groove (44), a sliding groove (45) and a second guide hole (46) which are communicated with each other are sequentially formed in the side part of the clamping table (27) from outside to inside, and the second guide hole (46) is communicated with the first guide hole (35); the rotary knob (40) is rotationally arranged on the rotary groove (44), a first annular limiting groove (47) is formed in the outer side of the rotary knob (40) along the circumferential direction, the limiting screw (41) is connected to the clamping table (27) in a threaded mode, the screw rod portion of the limiting screw (41) stretches into the first annular limiting groove (47), the locking needle (42) penetrates through the second guide hole (46), a sliding portion (48) matched with the sliding groove (45) is arranged at the position, located in the sliding groove (45), of the locking needle (42), one end of the second spring (43) abuts against the inner end of the sliding groove (45), the other end of the second spring (43) abuts against the sliding portion (48), a plurality of guide grooves (49) extending along the axial direction are formed in the sliding groove (45), and a plurality of guide protrusions (50) matched with the guide grooves (49) are formed in the sliding portion (48); a plurality of first arc-shaped convex parts (51) are distributed at one end of the sliding part (48) close to the knob (40) in a circumferential array, a first arc-shaped concave part (52) is formed between every two adjacent first arc-shaped convex parts (51), a plurality of second arc-shaped convex parts (53) matched with the first arc-shaped concave parts (52) are distributed at the inner end of the knob (40) in a circumferential array, a second arc-shaped concave part (54) is formed between every two second arc-shaped convex parts (53), and a first positioning concave part (55) for sliding in the corresponding first arc-shaped convex parts (51) is arranged at the middle of each first arc-shaped convex part (51); the positioning needle (31) is circumferentially provided with a second annular limiting groove (56), and the end part of the locking needle (42) is inserted into or separated from the second annular limiting groove (56) when the locking needle slides circumferentially.
2. The vacuum interrupter of claim 1, wherein: the switch bracket (1) is provided with three insulating sleeves (19), the insulating sleeves (19) are sleeved on the peripheries of the corresponding movable rod connecting pieces (5), the end parts of the first connecting arms (17) are connected to the inner sides of the corresponding insulating sleeves (19), and the insulating sleeves (19) are also provided with through holes (20) used for the vacuum tube wiring boards (8) to penetrate through.
3. The vacuum interrupter of claim 2, wherein: a plurality of insulating ribs (21) are arranged on the periphery of the insulating sleeve (19) along the axial direction.
4. The vacuum interrupter of claim 2, wherein: the insulating sleeve (19) is provided with an insulating plate (22) extending vertically at the positions corresponding to the left side and the right side of the vacuum tube wiring board (8).
5. The vacuum interrupter of claim 1, wherein: a polygonal linkage hole (23) is formed in the first connecting part (11), and a polygonal linkage part (24) which is matched with the polygonal linkage hole (23) is formed in the movable rod connecting piece (5); the periphery of the movable rod connecting piece (5) is also provided with a limiting convex edge (25), one side of the first connecting part (11) is propped against the limiting convex edge (25), and the other side of the first connecting part (11) is propped against the end part of the vacuum tube (4).
6. The vacuum interrupter of claim 1, wherein: the two sides of the clamping table (27) are provided with rolling bearings (57) corresponding to the upper and lower positions of the clamping channel (30) through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310935037.2A CN116798801B (en) | 2023-07-27 | 2023-07-27 | Vacuum circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310935037.2A CN116798801B (en) | 2023-07-27 | 2023-07-27 | Vacuum circuit breaker |
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| Publication Number | Publication Date |
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| CN116798801A CN116798801A (en) | 2023-09-22 |
| CN116798801B true CN116798801B (en) | 2024-07-16 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214254244U (en) * | 2020-12-31 | 2021-09-21 | 珠海康晋电气股份有限公司 | Vacuum circuit breaker |
| CN220290693U (en) * | 2023-07-27 | 2024-01-02 | 吉徽电气集团有限公司 | Vacuum circuit breaker |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834087B (en) * | 2010-04-19 | 2013-06-19 | 宏秀电气有限公司 | Improved high-voltage breaker |
| CN103208392B (en) * | 2012-01-13 | 2016-03-30 | 西门子公司 | Vacuum circuit-breaker |
| KR102173320B1 (en) * | 2019-01-31 | 2020-11-03 | 엘에스일렉트릭(주) | Vacuum circuit breaker |
| CN112382526B (en) * | 2020-10-22 | 2024-06-07 | 北京龙源开关设备有限责任公司 | Environment-friendly three-station upper isolating switch integrated circuit breaker |
| CN113267654B (en) * | 2021-07-21 | 2021-09-24 | 广东电网有限责任公司佛山供电局 | Electrical test fixture for high-voltage circuit breaker |
| CN114783797B (en) * | 2022-04-13 | 2023-07-25 | 廖长和 | Permanent magnet circuit breaker manual separation device |
| CN114937572B (en) * | 2022-07-25 | 2022-10-28 | 江苏华唐电器有限公司 | Compound maintaining spring operating mechanism of vacuum circuit breaker with voltage of 66kV and above |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214254244U (en) * | 2020-12-31 | 2021-09-21 | 珠海康晋电气股份有限公司 | Vacuum circuit breaker |
| CN220290693U (en) * | 2023-07-27 | 2024-01-02 | 吉徽电气集团有限公司 | Vacuum circuit breaker |
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