CN117690750B - Vacuum circuit breaker for protecting electric equipment of power distribution network - Google Patents
Vacuum circuit breaker for protecting electric equipment of power distribution network Download PDFInfo
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- CN117690750B CN117690750B CN202410144835.8A CN202410144835A CN117690750B CN 117690750 B CN117690750 B CN 117690750B CN 202410144835 A CN202410144835 A CN 202410144835A CN 117690750 B CN117690750 B CN 117690750B
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- 238000000034 method Methods 0.000 claims abstract description 6
- 238000007790 scraping Methods 0.000 claims description 14
- 238000002955 isolation Methods 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000003139 buffering effect Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 14
- 230000000712 assembly Effects 0.000 description 10
- 238000000429 assembly Methods 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The application relates to the technical field of circuit breaker equipment, and particularly discloses a vacuum circuit breaker for protecting electric equipment of a power distribution network. In the switching-on and switching-off processes of the vacuum circuit breaker, the throttling action of the throttling hole on the sliding plug is matched with the unidirectional opening of the unidirectional valve component, so that the pull rod II and the contact II normally move upwards and slowly move downwards, thereby effectively buffering the switching-on and switching-off processes of the vacuum circuit breaker, and simultaneously, the stroke of the contact during switching-on and switching-off processes is not increased.
Description
Technical Field
The application relates to the technical field of circuit breaker equipment, in particular to a vacuum circuit breaker for protecting electric equipment of a power distribution network.
Background
The vacuum circuit breaker for protecting electric equipment of power distribution network is a very important electric equipment, mainly used in control and protection circuit of power distribution system, it utilizes vacuum as insulating and arc-extinguishing medium, when the electric current exceeds the value of overcurrent set, the vacuum circuit breaker can cut off the circuit rapidly, protect the electric equipment from overcurrent or short circuit, the vacuum circuit breaker has movements fast, can cut off the fault current rapidly, reduce the damage of short circuit or overcurrent to electric equipment, the advantage such as being high in reliability and good in security, play an important role in the power distribution system.
However, when the existing vacuum circuit breaker is used, because the moving contact and the fixed contact are in rigid contact, when the moving contact and the fixed contact are switched on, the moving contact generates elastic collision after high-speed movement of the moving contact impacts the fixed contact, so that the elastic bouncing easily exceeds the range, an LC high-frequency oscillation is generated in a power system or equipment instantly, the insulation of the electrical equipment can be damaged by overvoltage generated by oscillation, fusion welding is also generated between the moving contact and the fixed contact, the service life of the vacuum circuit breaker contact is influenced, and when a spring is arranged for conventional buffering, the problems that the switching-off stroke is long, the contact is easy to reciprocate after the buffering is finished and the like exist.
Disclosure of Invention
The application provides a vacuum circuit breaker for protecting electric equipment of a power distribution network, which has the advantages of not affecting the stroke of opening and closing, and effectively buffering during closing, and is used for solving the problem that the impact collision degree of a moving contact to a static contact is large easily when the existing vacuum circuit breaker is used for closing.
In order to achieve the above purpose, the application adopts the following technical scheme: the utility model provides a vacuum circuit breaker for protection of distribution network electrical equipment, includes the insulating sleeve, and the top and the bottom of insulating sleeve inner chamber are all fixed the cover, and the fixed cover of insulating sleeve bottom is gone up movable sleeve and is equipped with pull rod I, the top fixedly connected with contact I of pull rod I, and the outside of pull rod I is equipped with the closing spring, and the outside of closing spring is equipped with bellows I, the fixed cover at insulating sleeve top is gone up movable sleeve and is equipped with pull rod II, the bottom fixedly connected with contact II of pull rod II, the outside of pull rod II is equipped with buffer spring, buffer spring's outside is equipped with bellows II, the top of bellows II and the fixed cover fixed connection at insulating sleeve top, the bottom fixedly connected with slide plug of bellows II, slide plug and II fixed connection, and offered the orifice on the slide plug, the fixed sleeve is equipped with the check valve subassembly that a plurality of circumference arrays distribute on the slide plug, be equipped with the upper sleeve outside the slide plug and the bellows II outside, and annotate in the upper sleeve has transformer oil.
In the switching-on and switching-off process of the vacuum circuit breaker, the throttling function of the throttling hole on the sliding plug is matched with the unidirectional opening of the unidirectional valve assembly, so that the pull rod II and the contact II move normally upwards and slowly move downwards.
Further, the lower half part of the inner cavity of the insulating sleeve is sleeved with a lower sleeve, and the closing spring is arranged in the lower sleeve.
Further, the bottom fixedly connected with sealing plug of sliding plug, the fixed plug is equipped with to the fixed cover in upper sleeve's bottom, and the inner arc wall of fixed plug cup joints and seals the laminating with the outer arc wall activity of pull rod II, be equipped with bellows III between sealing plug and the fixed plug.
Further, the check valve assembly comprises an upper valve sleeve fixedly sleeved on the sliding plug, an oil guide groove is formed in the top of the upper valve sleeve, a lower valve sleeve is sleeved at the bottom end of the upper valve sleeve, a through groove is formed in the periphery of the lower valve sleeve, a valve shaft is movably sleeved in the middle of the bottom end of the lower valve sleeve, a valve ball is fixedly connected to the top end of the valve shaft, and a valve spring located between the valve ball and the bottom end of the inner side of the lower valve sleeve is arranged on the valve shaft.
Further, fixed cover is equipped with to fixed cover on the pull rod II, fixed cover's outside fixed mounting has the cage, the outer arc wall of cage and insulating sleeve's inner arc wall activity cup joint, the bottom of cage is located contact II's below.
Further, the telescopic top of lower level is equipped with the location and scrapes the cover, the outer arc wall of cover is scraped in the location and is cup jointed and laminate the setting with the inner arc wall activity of cage, the top of cover is scraped in the location is the design of inboard inclined plane, and the top of cover is scraped in the location is located contact II's below all the time.
Further, the pull rod I and the contact I are of an integrated structure, and the pull rod II and the contact II are of an integrated structure.
Further, the inner edge at the top of the lower sleeve is provided with a bulge.
The invention has the beneficial effects that:
1. According to the vacuum circuit breaker for protecting the electric equipment of the power distribution network, the pull rod II is movably arranged, the buffer spring and the sliding plug are arranged in linkage with the pull rod II, the plurality of one-way valve assemblies and the orifice are arranged on the sliding plug, the throttling effect of the orifice on the sliding plug is matched with the one-way opening of the one-way valve assemblies, so that the pull rod II and the contact II move upwards normally and slowly downwards, the buffer spring is utilized to buffer when the vacuum circuit breaker is switched on, the rigid contact impact collision condition of the contact I and the contact II is prevented when the vacuum circuit breaker is switched on, the service life of the contact is prolonged, the problem that the contact I and the contact II reciprocate upwards and downwards due to the restoring force of the buffer spring after buffering is effectively avoided, and the service performance of the vacuum circuit breaker is improved.
2. The throttle effect of the throttle hole on the sliding plug is matched with the unidirectional opening of the one-way valve assembly, so that the pull rod II and the contact II move upwards normally and move downwards slowly, when the vacuum circuit breaker is opened, the moving speed of the contact I away from the contact II is far greater than the moving speed of the contact II moving downwards under the action of the elastic force of the buffer spring, the contact I and the contact II can be ensured to be disconnected rapidly when the vacuum circuit breaker is opened, the opening performance of the vacuum circuit breaker is not affected, and the two contacts can be kept close to each other after the opening is stable, so that the closing stroke cannot be increased.
3. Utilize the cage activity to set up in insulating sleeve, and the cage links with pull rod II, and the fixed location of setting in cooperation cage below is scraped the cover, when the brake is separating, utilizes pull rod II to drive the cage and scrapes the cover and move down in relative location, in time clears up the metal vapor that condenses on the inner arc wall of cage through the top that the cover was scraped in the location to avoid the metal vapor gathering on the inner arc wall of cage to condense, influence the problem of the normal work of circuit breaker easily after a long time, further improved vacuum circuit breaker's performance.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
The application may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic view showing a cut-away structure of a vacuum circuit breaker of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a schematic view of the upper half of the inner cavity of the insulating sleeve of FIG. 2;
FIG. 4 is a schematic perspective view of the slide plug of FIG. 3;
FIG. 5 is a schematic view of a partial enlarged structure at A in FIG. 4;
Fig. 6 is a schematic view of a vacuum interrupter in a closed state of a vacuum circuit breaker;
fig. 7 is a schematic view of a vacuum interrupter in a vacuum interrupter open state.
In the figure:
1. An insulating sleeve; 2. a lower sleeve; 3. an upper sleeve; 4. a fixed cover; 5. the pull rod I6 and the contact I; 7. a pull rod II; 8. a contact II; 9. a corrugated pipe I; 10. a closing spring; 11. a corrugated pipe II; 12. a sliding plug; 121. an orifice; 13. a buffer spring; 14. a sealing plug; 15. a bellows III; 16. a fixed plug; 17. a one-way valve assembly; 171. an upper valve sleeve; 172. a lower valve sleeve; 173. a valve shaft; 174. a valve ball; 175. a valve spring; 18. positioning a scraping sleeve; 19. a fixed sleeve; 20. and (5) isolating covers.
Detailed Description
The following description of the embodiments of the present application 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 application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1-2, a vacuum circuit breaker for protecting electrical equipment of a power distribution network comprises an insulation sleeve 1, wherein a lower sleeve 2 is sleeved on the lower half part of an inner cavity of the insulation sleeve 1, an upper sleeve 3 is sleeved on the upper half part of the inner cavity of the insulation sleeve 1, a fixing cover 4 is fixedly sleeved on the bottom and the top of the insulation sleeve 1, and the fixing cover 4 is matched with the limit effect of the protrusion of the inner wall of the lower sleeve 2 on the lower sleeve 2 and the limit effect of the upper sleeve 3 on the lower sleeve 2, so that the lower sleeve 2 and the upper sleeve 3 can be fixed in the insulation sleeve 1.
The lower half activity of insulating sleeve 1 inner chamber is provided with pull rod I5, the outer arc wall of pull rod I5 cup joints and seals the laminating with the inner wall activity of the fixed lid 4 of insulating sleeve 1 bottom, the top fixedly connected with of pull rod I5 is located the contact I6 of lower sleeve 2 top, and pull rod I5 and contact I6 are integrated into one piece structural design, the fixed lid 4 upper portion fixedly connected with bellows I9 of insulating sleeve 1 bottom, bellows I9 movable sleeve dress is in the outside of pull rod I5, and the top of bellows I9 and the outer arc wall fixed connection of pull rod I5, when making pull rod I5 remove, utilize bellows I9 to form effectual leakproofness in the lower half of lower sleeve 2, prevent that the vacuum in the vacuum interrupter that insulating sleeve 1 inner chamber contact I6 is located from reducing, the inside of bellows I9 is equipped with the switch-on spring 10 of movable sleeve in the outside of pull rod I5, through the elasticity effect of switch-on spring 10, can make pull rod I5 upwards move.
The upper half part of the inner cavity of the insulating sleeve 1 is movably provided with a pull rod II 7, the outer arc wall of the pull rod II 7 is movably sleeved and sealed attached with the inner wall of the fixed cover 4 at the top of the insulating sleeve 1, the bottom end of the pull rod II 7 is fixedly connected with a contact II 8 positioned below the upper sleeve 3, the pull rod II 7 and the contact II 8 are of an integrated structural design, the fixed cover 4 at the top of the insulating sleeve 1 is fixedly connected with a corrugated pipe II 11, referring to figures 2-3, the bottom end of the corrugated pipe II 11 is fixedly connected with a sliding plug 12, the outer arc wall of the sliding plug 12 is movably sleeved and sealed attached with the inner arc wall of the upper sleeve 3, the inner arc wall of the sliding plug 12 is fixedly arranged with the pull rod II 7, when the pull rod II 7 moves, the sliding plug 12 can be driven to move together, the corrugated pipe II 11 is arranged between the fixed cover 4 at the top of the insulating sleeve 1 and the sliding plug 12, the inside of the corrugated pipe II 11 is provided with a buffer spring 13 movably sleeved outside the pull rod II 7, when the vacuum circuit breaker is switched on, the pull rod I5 drives the contact I6 to move upwards, the contact I6 contacts with the contact II 8 and pushes the contact II 8 and the pull rod II 7 to move upwards further, the buffer spring 13 is compressed, thereby buffering by the elastic force of the buffer spring 13, after buffering is finished, the contact I6 and the contact II 8 resume to the position after the elastic force of the buffer spring 13 and the switching-on spring 10 is balanced, the contact I6 and the contact II 8 can effectively keep a stable attaching state under the elastic force of the buffer spring 13 and the switching-on spring 10, compared with the mode that the contact II 8 is set to be in a fixed state in the existing vacuum circuit breaker, when switching-on is prevented, the moving speed of the contact I6 towards the contact II 8 is high, the kinetic energy and impulse of the contact I6 are large, the contact I6 and the contact II 8 are rigid, when the contact I6 and the contact II 8 are closed, in the elastic collision process of the contact I6 and the contact II 8, the elastic bouncing exceeds the range, so that an LC high-frequency oscillation is generated in a power system or equipment instantly, the insulation of the electrical equipment can be damaged due to overvoltage generated by the oscillation, fusion welding can be generated between the moving contact and the fixed contact, and the service life of the contact of the vacuum circuit breaker is influenced.
The fixed cover in bottom of upper sleeve 3 is equipped with fixed stopper 16, and the inner arc wall of fixed stopper 16 cup joints and seals the laminating with the outer arc wall activity of pull rod II 7, and the bottom fixedly connected with sealing plug 14 of sliding plug 12 is equipped with bellows III 15 between sealing plug 14 and the fixed stopper 16, utilizes bellows III 15 and bellows II 11 to form sealedly in the upper half of insulating sleeve 1 to ensure the vacuum degree of vacuum interrupter in the insulating sleeve 1.
The upper sleeve 3 is internally filled with transformer oil outside the corrugated pipe III 15 and the corrugated pipe II 11, referring to fig. 3-5, the sliding plug 12 is provided with an orifice 121, the bottom of the sliding plug 12 is fixedly sleeved with a plurality of one-way valve assemblies 17, the number of the one-way valve assemblies 17 is not less than two, the plurality of one-way valve assemblies 17 are circumferentially distributed on the sliding plug 12, the one-way valve assemblies 17 and the orifice 121 are arranged in a staggered manner, the one-way valve assemblies 17 and the orifice 121 are both positioned on the outer side of the buffer spring 13, the one-way valve assemblies 17 comprise an upper valve sleeve 171 fixedly sleeved on the sliding plug 12, the top of the upper valve sleeve 171 is provided with an oil guide groove, the bottom end of the upper valve sleeve 171 is fixedly sleeved with a lower valve sleeve 172, the periphery of the lower valve sleeve 172 is provided with a through groove, the middle of the bottom end of the lower valve shaft 172 is movably sleeved with a valve shaft 173, the top end of the valve shaft 173 is fixedly connected with a valve ball 174, the valve ball 173 is arranged on the valve sleeve 173, a valve spring 175 is arranged between the valve ball 174 and the bottom end of the inner side of the lower valve sleeve 172, and the valve shaft 175 keeps the trend of sealing the oil guide groove under the elastic force of the valve spring 175.
When the switch is closed, the contact I6 pushes the contact II 8 and the pull rod II 7 to move upwards, thereby pushing the sliding plug 12 to move upwards, at the moment, the pressure of transformer oil above the sliding plug 12 to the valve ball 174 overcomes the elasticity of the valve spring 175, so that the valve ball 174 moves downwards, the one-way valve assembly 17 is opened, transformer oil above the sliding plug 12 flows downwards through all the one-way valve assemblies 17 on the sliding plug 12, the whole upwards movement of the sliding plug 12, the pull rod II 7 and the contact II 8 is not influenced, and therefore, the impact during the switch-on can be buffered by utilizing the buffer spring 13, the buffer spring 13 can push the sliding plug 12 to drive the pull rod II 7, the contact II 8 and the contact I6 to move downwards after the compression guide is maximum, at the moment, the elasticity of the valve spring 175 enables the valve ball 174 to block the oil guide groove, all the one-way valve assemblies 17 on the sliding plug 12 are in a closed state, and transformer oil below the sliding plug 12 can only flow upwards through the throttle hole 121, so that the buffer spring 13 can rebound after being compressed by utilizing the throttle hole 121, the buffer spring 13 can push the sliding plug 12, the pull rod II 7, the contact II 8 and the contact II 6 to move until the buffer spring 13 and the buffer spring I are in a state of the compression spring 10 is in a state of the opposite to avoid the problem of rebound, and the buffer II is in the state of the buffer II, and the buffer II is in the compression, and the problem of the buffer spring is restored when the compression spring is in the compression spring and has been restored.
When the switch-off is performed, the pull rod I5 pulls the contact I6 to rapidly move away from the contact II 8, the elastic force of the buffer spring 13 pushes the sliding plug 12, the pull rod II 7 and the contact II 8 to continuously move downwards, the throttle effect of the throttle hole 121 is utilized, so that the downward moving speed of the pull rod II 7 and the contact II 8 is far smaller than that of the contact I6 and the pull rod I5, the contact I6 and the contact II 8 can be rapidly disconnected when the switch-off is performed, and the switch-off performance of the vacuum circuit breaker is basically not influenced when the switch-on buffer function of the vacuum circuit breaker is increased.
Referring to fig. 2 and 6, a fixed sleeve 19 is fixedly sleeved on the pull rod ii 7, a shielding cover 20 is fixedly mounted on the outer side of the fixed sleeve 19, an outer arc wall of the shielding cover 20 is movably sleeved with an inner arc wall of the insulating sleeve 1, the bottom end of the shielding cover 20 is always located below the contact ii 8, a positioning scraping sleeve 18 is arranged at the top end of the lower sleeve 2, the outer arc wall of the positioning scraping sleeve 18 is movably sleeved and attached to the inner arc wall of the shielding cover 20, the top end of the positioning scraping sleeve 18 is designed to be an inward inclined plane, and the top end of the positioning scraping sleeve 18 is always located below the contact ii 8.
Referring to fig. 6 and 7, during opening, the contact i 6 is pulled by the pull rod i 5 to move away from the contact ii 8, meanwhile, the contact ii 8 and the pull rod ii 7 continue to move slowly and downwards under the action of the elastic force of the buffer spring 13, an arc is generated when the contact i 6 and the contact ii 8 are opened, the surfaces of the contact i 6 and the contact ii 8 volatilize metal vapor at high temperature, part of the metal vapor is condensed on the inner arc wall of the isolation cover 20, the pull rod ii 7 is utilized to drive the isolation cover 20 to move downwards relative to the positioning scraping sleeve 18, and the top end of the positioning scraping sleeve 18 is utilized to timely clean the condensed metal vapor on the inner arc wall of the isolation cover 20, so that the problem that the normal operation of the circuit breaker is easily affected after a long time is avoided, and the performance of the vacuum circuit breaker is further improved.
The principle of use of the vacuum circuit breaker for protecting electrical equipment of the distribution network is as follows, when the switch is closed, the elasticity of the closing spring 10 pushes the pull rod I5 and the contact I6 to move upwards, after the contact I6 contacts the contact II 8, the contact I6 pushes the contact II 8, the pull rod II 7 and the slide plug 12 to move upwards together, at the moment, each one-way valve assembly 17 arranged at the bottom of the slide plug 12 is in an open state, transformer oil above the slide plug 12 can flow to the lower part of the slide plug 12 through the one-way valve assembly 17, meanwhile, the impact when the contact I6 contacts the contact II 8 is buffered by the compression of the buffer spring 13 until the buffer spring 13 is rebounded after being compressed to the maximum extent, the slide plug 12, the pull rod II 7, the contact II 8, the contact I6 and the pull rod I5 are pushed to move downwards integrally, at the moment, the one-way valve assembly 17 is closed, transformer oil below the slide plug 12 can only flow to the upper part of the slide plug 12 through the throttle hole 121, and the whole of the pull rod II 7, the contact II 8 and the contact I6 and I5 can be moved downwards until the slide plug I6 and the contact II 8 are in the position shown in fig. 6 by the throttle effect of the throttle hole 121.
When the switch-off is carried out, the pull rod I5 pulls the contact I6 to move away from the contact II 8, meanwhile, the contact II 8 and the pull rod II 7 continue to move downwards slowly under the action of the elastic force of the buffer spring 13, an electric arc is generated when the contact I6 and the contact II 8 switch off, metal vapor at the volatilized position of the surfaces of the contact I6 and the contact II 8 can volatilize part of the metal vapor on the inner wall of the isolation cover 20 outside the contact I6 and the contact II 8, after the contact I6 moves to the position shown in fig. 7 at first, the contact II 8 moves downwards slowly until the contact I6 is close, meanwhile, the isolation cover 20 moves downwards relative to the positioning scraping sleeve 18, the top end of the positioning scraping sleeve 18 can timely clean condensed metal vapor on the inner arc wall of the isolation cover 20, the problem that the condensed metal vapor is difficult to clean after the condensation and drying is avoided, and the inner edge of the top of the lower sleeve 2 is provided with a bulge so as to prevent the condensed metal vapor solid cleaned by the positioning scraping sleeve 18 from contacting the pull rod I5.
Claims (8)
1. The utility model provides a vacuum circuit breaker for protection of distribution network electrical equipment, includes insulating sleeve (1), and the top and the bottom of insulating sleeve (1) inner chamber are all fixed cover and are equipped with fixed lid (4), and the fixed lid (4) of insulating sleeve (1) bottom is gone up the movable sleeve and is equipped with pull rod I (5), and the top fixedly connected with contact I (6) of pull rod I (5), and the outside of pull rod I (5) is equipped with closing spring (10), and the outside of closing spring (10) is equipped with bellows I (9), a serial communication port, movable sleeve is equipped with pull rod II (7) on fixed lid (4) at insulating sleeve (1) top, the bottom fixedly connected with contact II (8) of pull rod II (7), the outside of pull rod II (7) is equipped with buffer spring (13), the outside of buffer spring (13) is equipped with bellows II (11), the top of bellows II (11) and fixed lid (4) at insulating sleeve (1) top are fixedly connected, the bottom fixedly connected with slide plug II (12), slide plug (12) and a plurality of fixed plug (12) are equipped with on the fixed array of slide valves (121) and are equipped with one-way plug (12), an upper sleeve (3) positioned at the outer side of the sliding plug (12) and the outer side of the corrugated pipe II (11) is arranged in the insulating sleeve (1), and transformer oil is injected into the upper sleeve (3);
In the switching-on and switching-off process of the vacuum circuit breaker, the throttling action of the throttling hole (121) on the sliding plug (12) is matched with the unidirectional opening of the unidirectional valve assembly (17), so that the pull rod II (7) and the contact II (8) move normally upwards and slowly downwards.
2. The vacuum circuit breaker for protecting electrical equipment of a power distribution network according to claim 1, wherein a lower sleeve (2) is sleeved on the lower half part of the inner cavity of the insulating sleeve (1), and the closing spring (10) is arranged inside the lower sleeve (2).
3. The vacuum circuit breaker for protecting electrical equipment of a power distribution network according to claim 1, wherein a sealing plug (14) is fixedly connected to the bottom of the sliding plug (12), a fixed plug (16) is fixedly sleeved at the bottom of the upper sleeve (3), an inner arc wall of the fixed plug (16) is movably sleeved with an outer arc wall of the pull rod II (7) and is in sealing fit with the outer arc wall of the pull rod II, and a corrugated pipe III (15) is arranged between the sealing plug (14) and the fixed plug (16).
4. The vacuum circuit breaker for protecting electrical equipment of a power distribution network according to claim 1, wherein the one-way valve assembly (17) comprises an upper valve sleeve (171) fixedly sleeved on a sliding plug (12), an oil guide groove is formed in the top of the upper valve sleeve (171), a lower valve sleeve (172) is sleeved at the bottom end of the upper valve sleeve (171), a through groove is formed in the peripheral side of the lower valve sleeve (172), a valve shaft (173) is movably sleeved in the middle of the bottom end of the lower valve sleeve (172), a valve ball (174) is fixedly connected to the top end of the valve shaft (173), and a valve spring (175) positioned between the valve ball (174) and the inner bottom end of the lower valve sleeve (172) is arranged on the valve shaft (173).
5. The vacuum circuit breaker for protecting electrical equipment of a power distribution network according to claim 2, wherein a fixed sleeve (19) is fixedly sleeved on the pull rod II (7), an isolation cover (20) is fixedly installed on the outer side of the fixed sleeve (19), the outer arc wall of the isolation cover (20) is movably sleeved with the inner arc wall of the insulation sleeve (1), and the bottom end of the isolation cover (20) is positioned below the contact II (8).
6. The vacuum circuit breaker for protecting electrical equipment of power distribution network according to claim 5, wherein the top end of the lower sleeve (2) is provided with a positioning scraping sleeve (18), the outer arc wall of the positioning scraping sleeve (18) is movably sleeved and attached to the inner arc wall of the isolation cover (20), the top end of the positioning scraping sleeve (18) is designed to be an inward inclined plane, and the top end of the positioning scraping sleeve (18) is always positioned below the contact II (8).
7. The vacuum circuit breaker for protecting electrical equipment of a power distribution network according to claim 1, wherein the pull rod i (5) and the contact i (6) are integrally formed, and the pull rod ii (7) and the contact ii (8) are integrally formed.
8. Vacuum circuit breaker for protection of electrical equipment of distribution network according to claim 2, characterized in that the inner edge of the top of the lower sleeve (2) is provided with a protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410144835.8A CN117690750B (en) | 2024-02-01 | 2024-02-01 | Vacuum circuit breaker for protecting electric equipment of power distribution network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410144835.8A CN117690750B (en) | 2024-02-01 | 2024-02-01 | Vacuum circuit breaker for protecting electric equipment of power distribution network |
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| CN117690750A CN117690750A (en) | 2024-03-12 |
| CN117690750B true CN117690750B (en) | 2024-04-26 |
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|---|---|---|---|---|
| US3610855A (en) * | 1968-12-30 | 1971-10-05 | Inoue Electric Mfg Co Ltd | Oil circuit breaker including contact braking device |
| CN201252013Y (en) * | 2008-09-05 | 2009-06-03 | 河南森源电气股份有限公司 | Oil buffer for high-voltage alternating current breaker |
| CN201845669U (en) * | 2010-09-17 | 2011-05-25 | 平高集团有限公司 | Oil buffer and breaker using same |
| CN102054606A (en) * | 2010-11-03 | 2011-05-11 | 江苏现代电力电容器有限公司 | Soft-collision electromagnetic driving mechanism |
| CN203553024U (en) * | 2013-09-27 | 2014-04-16 | 北京电研华源电力技术有限公司 | Three-position isolation switch embedded pole |
| CN204167185U (en) * | 2014-09-16 | 2015-02-18 | 唐超 | A kind of electric spring operation machine for high pressure and extra high voltage circuit breaker |
| DE102016215887A1 (en) * | 2016-08-24 | 2018-03-01 | Siemens Aktiengesellschaft | Switchgear assembly and method for operating a switchgear assembly |
| CN207558689U (en) * | 2017-12-25 | 2018-06-29 | 厦门德普乐能源科技有限公司 | A kind of multi-directionally has the oil bumper of installation by oneself |
| CN111199847A (en) * | 2018-11-16 | 2020-05-26 | 吴长兰 | Circuit breaker |
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|---|---|
| CN117690750A (en) | 2024-03-12 |
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