CN111952111B - Double-fracture quick vacuum arc extinguish chamber - Google Patents
Double-fracture quick vacuum arc extinguish chamber Download PDFInfo
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- CN111952111B CN111952111B CN202010773560.6A CN202010773560A CN111952111B CN 111952111 B CN111952111 B CN 111952111B CN 202010773560 A CN202010773560 A CN 202010773560A CN 111952111 B CN111952111 B CN 111952111B
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- static contact
- groove
- guide rod
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- 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
- 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
- H01H33/66238—Specific bellows details
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- 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
- H01H33/666—Operating arrangements
Abstract
The invention discloses a double-break quick vacuum arc extinguish chamber, which belongs to the technical field of electricity and comprises an upper shell, a lower shell, an incoming line guide rod, an outgoing line static contact seat and a guide device, wherein the outgoing line static contact seat is fixedly connected with an outgoing line static contact base body, and an outgoing line groove is formed in the outgoing line static contact base body; the inlet wire guide rod penetrates through the upper shell, and the inner end of the inlet wire guide rod is connected with an inlet wire static contact seat; the incoming line static contact seat and the outgoing line static contact base body are arranged at intervals, and an incoming line groove is formed in the incoming line static contact seat; an auxiliary contact is arranged at one end of the guide device, the guide device drives the auxiliary contact to move, and the auxiliary contact is communicated and disconnected with the incoming line static contact seat and the outgoing line static contact base body, so that the electrical on-off function of the vacuum arc extinguish chamber is realized; when the switch is switched on, the wire inlet groove and the wire outlet groove are in fit contact with the auxiliary contact, so that the switching-on bounce times and amplitude are reduced; the double-fracture structure has large breaking capacity and small contact opening distance, can improve the rapid opening and closing capacity, and improves the overall electrical performance and mechanical life.
Description
Technical Field
The invention belongs to the technical field of electricity, and particularly relates to a double-break quick vacuum arc-extinguishing chamber.
Background
In the field of high-voltage electrical technology, especially in high-current high-speed circuit breakers, a vacuum arc-extinguishing chamber is often used to replace a conventional mechanical contact. The vacuum degree in the vacuum arc-extinguishing chamber is about 10-4pa generally, and the gap insulation is very high, so the contact opening distance of the vacuum arc-extinguishing chamber can be very small, and the moving contact is in linkage telescopic operation with the operating mechanism by utilizing a corrugated pipe made of metal.
The increasing complexity of the grid load characteristics makes the loads connected to the power system highly susceptible to disturbances from the power system, such as voltage sag and surge, and therefore places increasingly stringent demands on power quality and operational reliability. In order to protect sensitive important industrial loads and to improve the quality of the electrical energy of the electrical power system, a protective device, a high-voltage circuit breaker, is required to have a high-speed switching-on and switching-off characteristic.
At present, a vacuum arc extinguish chamber matched with a high-voltage circuit breaker has large moving contact mass and larger mass of moving parts (such as insulating pull rods) due to large rated current. The limitation of the switching-off mechanical characteristics is that the average switching-off speed is not more than 1.3m/s, and the average switching-on speed is not more than 0.8 m/s. The high-speed switch generally requires the minimum switching-on and switching-off speed to be more than 1.8m/s, and the existing vacuum arc-extinguishing chamber is used under the condition, because the moving parts such as the moving contact and the like have large mass and generate very large motion kinetic energy under the condition of high-speed motion, the contact is easy to impact and damage, the switching-on bounce is aggravated, and the electrical performance and the mechanical life of the high-speed switch are reduced.
At present, no vacuum arc-extinguishing chamber product which is completely matched with the performance parameters of the high-speed switch exists, and if the conventional product is used, the product performance is poor, the service life is greatly reduced, and the industrialization requirement cannot be met.
Disclosure of Invention
The invention provides a double-break rapid vacuum arc-extinguishing chamber, aiming at solving the problems that when the existing vacuum arc-extinguishing chamber is switched on and off at a high speed, very large motion kinetic energy is generated under the condition of high-speed motion, so that a contact is easy to be impacted and damaged, the switching-on bounce is aggravated, the electrical performance and the mechanical service life of the contact are reduced, the product performance is poor, the service life is greatly shortened, and the industrialization requirement cannot be met.
The invention is realized by the following technical scheme.
A double-break quick vacuum arc extinguish chamber comprises an upper shell, a lower shell, a wire inlet guide rod, a wire outlet static contact seat and a guide device, wherein the wire outlet static contact seat is fixedly arranged between the upper shell and the lower shell, the inner side of the wire outlet static contact seat is fixedly connected with a wire outlet static contact base body, and a wire outlet groove is formed in the wire outlet static contact base body; the inlet wire guide rod penetrates through the upper shell and is fixedly connected with the upper shell, and the inner end of the inlet wire guide rod is connected with an inlet wire static contact seat; the incoming line static contact seat and the outgoing line static contact base body are arranged at intervals, and an incoming line groove is formed in the incoming line static contact seat; the guide device is slidably mounted on the lower shell, an auxiliary contact matched with the wire inlet groove and the wire outlet groove is arranged at one end close to the wire inlet guide rod, and the guide device drives the auxiliary contact to move to connect or disconnect the wire outlet static contact base body and the wire inlet static contact base.
The invention is further improved in that the wire inlet groove and the wire outlet groove are both V-shaped circumferential grooves and are on the circumference of the same plane; the auxiliary contact is in an annular structure matched with the circumferential groove.
In a further improvement of the present invention, the opening of the circumferential groove is formed in a right-angled shape, and the auxiliary contact has a right-angled bent plate-like structure fitted to the circumferential groove.
The invention further improves that the outgoing line static contact seat is of an annular structure, and at least two static contact matrixes are uniformly distributed on the annular inner wall of the outgoing line static contact seat at intervals.
The invention further improves that the inlet wire static contact seat is fixedly connected with the upper shell through a positioning pin.
The invention is further improved in that the surfaces of the wire inlet groove and the wire outlet groove are respectively covered with a contact layer.
The invention further improves the structure that the guide device comprises an auxiliary contact substrate, an auxiliary bracket and a movable guide rod which are sequentially and fixedly connected, wherein the auxiliary bracket is made of ceramic insulating materials, the auxiliary contact covers the surface of the auxiliary contact substrate, and the movable guide rod penetrates through the lower shell and slides in a guide way through the lower shell.
The invention is further improved in that a guide sleeve is fixedly arranged on the lower shell, and the movable guide rod penetrates through the guide sleeve in a sliding manner.
The invention further improves the structure that a guide strip is arranged on the inner side of the guide sleeve along the axial direction of the movable guide rod, and a sliding groove matched with the guide strip is arranged on the movable guide rod.
The invention is further improved in that the movable guide rod is sleeved with a corrugated pipe, one end of the corrugated pipe is fixedly connected with the lower shell, and the other end of the corrugated pipe is fixedly connected with one end of the movable guide rod close to the auxiliary bracket.
According to the technical scheme, the invention has the beneficial effects that: 1. the guide device is driven by an external operating mechanism to enable the auxiliary contact to move up and down, and the auxiliary contact is used for connecting and disconnecting the incoming line static contact seat and the outgoing line static contact base body, so that the electrical on-off function of the vacuum arc extinguish chamber is realized; when the auxiliary contact is communicated, the wire inlet groove and the wire outlet groove are respectively in fit contact with the auxiliary contact, so that the switching-on bounce times and amplitude can be effectively reduced; the double-break structure improves the breaking capacity, reduces the opening distance of the contact, greatly shortens the running distance of the guide device, shortens the switching-on and switching-off time, improves the rapid switching-on and switching-off capacity, effectively ensures the service life of the auxiliary contact in the rapid switching-on and switching-off, inhibits and counteracts the bounce during switching-on, and improves the overall electrical performance and the mechanical life. 2. The auxiliary contact with the annular structure is communicated with the wire inlet groove and the wire outlet groove on the circumference of the same plane, no coil magnetic field is generated in a closing and flow guiding state, and the temperature is increased; the electric field is symmetrically and uniformly distributed, and the rationality of the circumferential groove of the V-shaped structure is favorable for prolonging the electric service life. 3. The auxiliary contact is integrally of a right-angle bent plate-shaped structure, only the outgoing line static contact base body and the incoming line static contact base body are connected for conducting electricity, the mass of the auxiliary contact can be the lightest, the same output force of an operating mechanism can be obtained, the initial speed is higher compared with that of a moving contact with large mass in the prior art, the kinetic energy of closing collision is reduced, the damage degree of the contact is reduced, the service life of the contact is prolonged, the running distance of a guide device can be greatly shortened, the bouncing inertia performance is small during closing, and the closing bounce times and amplitude can be effectively reduced. 4. The V-shaped structure of the auxiliary contact and the magnetic field effect of the power arc flow can form a diffusible vacuum arc, the burning loss of the arc to the contact can be greatly reduced, the load capacity is strong, and the breaking capacity is remarkably enhanced. 5. The positioning pin positions the inlet wire static contact seat, so that the stability and the firmness of the fixation of the inlet wire static contact seat are ensured. 6. The arrangement of the contact layer can enhance the electrical performance and ensure better arc resistance. 7. The arrangement of the auxiliary bracket made of high-strength low-density ceramic insulating materials can greatly reduce the overall weight of the guide device, the same force applied by the operating mechanism can obtain higher initial speed, the closing impact kinetic energy is reduced, the damage degree to the contact is reduced, and the service life of the contact is prolonged; when the switch is in an opening state, the auxiliary contact is ensured to be a suspension potential, and the switch has good electrical performance. 8. The movable guide rod is guided in a sliding mode through the guide sleeve, the up-and-down movement of the auxiliary contact is achieved, the connection and disconnection of the incoming line static contact seat and the outgoing line static contact base body are achieved, and the guide is precise and stable. 9. The guide strip limits the horizontal rotation direction of the movable guide rod, and the auxiliary contact is prevented from rotating. 10. The auxiliary contact is in contact communication with the inlet static contact seat and the outlet static contact base body under the elastic force of the corrugated pipe, has certain pressure, namely the self-closing force of the contact, and is in a conducting state at the moment; only when the brake is switched off, the operating mechanism drives the movable guide rod to overcome the elasticity of the corrugated pipe to move downwards, the work of the operating mechanism can be reduced, and the energy consumption is saved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a-a in fig. 1.
Fig. 3 is a schematic cross-sectional view of B-B in fig. 2.
Fig. 4 is a schematic structural view of an incoming static contact pedestal according to an embodiment of the invention.
Fig. 5 is a schematic structural view of a stationary contact block for outgoing lines according to an embodiment of the invention.
Fig. 6 is a schematic view of an auxiliary contact structure according to an embodiment of the present invention.
Fig. 7 is a schematic structural view of a guide device according to an embodiment of the present invention.
In the drawings: 1. the wire inlet guide rod comprises a wire inlet guide rod body 2, an upper shell body 3, a positioning pin 4, a wire inlet static contact seat 41, a wire inlet groove 5, a contact layer 6, a wire outlet static contact seat 61, a wire outlet static contact base body 62, a wire outlet groove 7, a lower shell body 8, an auxiliary contact 9, an auxiliary contact base body 10, an auxiliary bracket 11, a corrugated pipe 12, a guide sleeve 13 and a movable guide rod.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.
As shown in the attached drawings, the double-break rapid vacuum arc-extinguishing chamber comprises an upper shell 2, a lower shell 7, an incoming line guide rod 1, an outgoing line static contact seat 6 and a guide device, wherein the outgoing line static contact seat 6 is fixedly arranged between the upper shell 2 and the lower shell 7, the inner side of the outgoing line static contact seat is fixedly connected with an outgoing line static contact base body 61, and an outgoing line groove 62 is formed in the outgoing line static contact base body 61; the incoming line guide rod 1 penetrates through the upper shell 2 and is fixedly connected with the upper shell 2, and the inner end of the incoming line guide rod 1 is connected with an incoming line static contact seat 4; the incoming line static contact seat 4 and the outgoing line static contact base body 61 are arranged at intervals, a safe distance is reserved between the incoming line static contact seat 4 and the outgoing line static contact base body 61 to prevent electric breakdown, and an incoming line groove 41 is formed in the incoming line static contact seat 4; the guide device is slidably mounted on the lower shell 7, an auxiliary contact 8 matched with the wire inlet groove 41 and the wire outlet groove 62 is arranged at one end close to the wire inlet guide rod 1, the guide device drives the auxiliary contact 8 to move, and the wire outlet static contact base body 61 is communicated with or disconnected from the wire inlet static contact base 4.
The upper shell 2 and the lower shell 7 are respectively brazed with the upper side and the lower side of the outgoing line static contact seat 6 into a whole to form a sealed shell structure, the guide device is driven by an external operating mechanism and slides up and down on the lower shell 7 to guide the auxiliary contact 8 to move up and down, and the auxiliary contact 8 is used for connecting and disconnecting the incoming line static contact seat 4 and the outgoing line static contact base body 61, so that the electrical on-off function of the vacuum arc extinguish chamber is realized. When the auxiliary contact 8 is communicated, the wire inlet groove 41 and the wire outlet groove 62 are respectively in fit contact with the auxiliary contact 8, the fit contact surface is large, and the closing bounce times and amplitude can be effectively reduced during closing; and the double-break structure is adopted, compared with a single break, the on-off capacity of the double-break switch is doubled, the opening distance of a contact is reduced by half, the running distance of a guide device is greatly shortened, the on-off time is shortened, and the rapid on-off capacity can be greatly improved. Effectively guarantee the life of auxiliary contact 8 in the quick divide-shut brake to spring when closing a floodgate is restrained and is offset, improve whole electrical properties and mechanical life.
The lower shell 7 is preferably made of copper and has the functions of conducting current, vacuum shell sleeve, contact steam splashing cooling and the like; the upper housing 2 is preferably of an insulating ceramic material with good insulating sealing and shielding action. The incoming line guide rod 1 is an incoming line end, the lower shell 7 and the outgoing line static contact seat 6 form an outgoing line end integrally, the bottom surface of the lower shell 7 is preferably a power-derived static wiring end, and a threaded hole is formed in the bottom surface of the lower shell and used for installing an outgoing line copper bar.
The wire inlet groove 41 and the wire outlet groove 62 are both V-shaped circumferential grooves and are on the circumference of the same plane; the auxiliary contacts 8 are in an annular structure matched with the circumferential grooves. The auxiliary contact 8 with the annular structure is communicated with the wire inlet groove 41 and the wire outlet groove 62 on the circumference of the same plane, no coil magnetic field is generated in a closing and flow guiding state, and the temperature is raised; the electric field is symmetrically and uniformly distributed, and the rationality of the circumferential groove of the V-shaped structure is favorable for prolonging the electric service life.
The opening of the circumferential groove is right-angled, and the auxiliary contact 8 is in a right-angled bent plate-shaped structure matched with the circumferential groove. The auxiliary contact 8 is integrally of a right-angle bent plate-shaped structure, only the outgoing line static contact base body 61 and the incoming line static contact base body 4 are connected for electric conduction, the quality of the auxiliary contact can be lightest, the same output force of an operating mechanism is exerted, the initial speed is higher compared with that of a moving contact with large quality in the prior art, the closing collision kinetic energy is reduced, the damage degree to the contact is reduced, the service life of the contact is prolonged, the running distance of a guide device can be greatly shortened, the bouncing inertia performance is small during closing, and the closing bounce times and amplitude can be effectively reduced.
The outlet static contact seat 6 is of an annular structure, at least two static contact base bodies 61 are arranged, and the two static contact base bodies are uniformly distributed on the annular inner wall of the outlet static contact seat 6 at intervals. The plurality of diversion branches can be customized according to the load. Taking the number of the static contact bases 61 as two for illustration, as shown in fig. 3-7, the auxiliary contact 8 divides the load into four current-carrying paths, has 8 current-guiding branches, and each path of power flow has four conductive contact surfaces, and due to the V-shaped structure of the auxiliary contact 8 and the magnetic field effect of the power arc flow, there may be 16 arc surfaces in an ideal state. And the 16 arc columns can form diffusible vacuum arcs, so that the burning loss of the arc to the contact is greatly reduced, the load capacity is strong, and the breaking capacity is remarkably enhanced.
The inlet wire static contact seat 4 is fixedly connected with the upper shell 2 through a positioning pin 3. The positioning pin 3 positions the incoming line static contact seat 4, so that the fixing stability and firmness of the incoming line static contact seat are ensured.
The surfaces of the wire inlet groove 41 and the wire outlet groove 62 are both covered with a contact layer 5 made of copper and tungsten. The contact layer 5 is 2-3mm thick, and can enhance the electrical performance and ensure better arc resistance.
The guiding device comprises an auxiliary contact base body 9, an auxiliary bracket 10 and a movable guide rod 13 which are fixed in a brazing mode in sequence, the auxiliary bracket 10 is made of high-strength low-density ceramic insulation materials, the movable guide rod 13 is made of light metal materials, the auxiliary contact 8 covers the surface of the auxiliary contact base body 9, and the movable guide rod 13 penetrates through the lower shell 7 and slides in a guiding mode through the lower shell 7. The auxiliary contact base body 9, the auxiliary bracket 10 and the movable guide rod 13 are fixed together by brazing; the arrangement of the auxiliary bracket 10 made of high-strength low-density ceramic insulation materials can greatly reduce the overall weight of the guide device, the same force applied by the operating mechanism can obtain higher initial speed, the closing impact kinetic energy is reduced, the damage degree to the contact is reduced, and the service life of the contact is prolonged; when the switch is in an opening state, the auxiliary contact 8 is ensured to be a suspension potential, and the switch has good electrical performance.
A guide sleeve 12 is fixedly mounted on the lower shell 7, and the movable guide rod 13 penetrates through the guide sleeve 12 in a sliding manner. The movable guide rod 13 is guided in a sliding mode through the guide sleeve 12, the up-and-down movement of the auxiliary contact 8 is achieved, the connection and disconnection of the incoming line static contact seat 4 and the outgoing line static contact base body 61 are achieved, and guiding is precise and stable.
The inner side of the guide sleeve 12 is provided with a guide strip along the axial direction of the movable guide rod 13, and the movable guide rod 13 is provided with a sliding groove matched with the guide strip. The horizontal direction of rotation of guide bar 13 is spacing to the gib block, prevents that auxiliary contact 8 from rotatory, guarantees stability and the reliability of using.
The movable guide rod 13 is sleeved with a corrugated pipe 11, one end of the corrugated pipe 11 is fixedly connected with the inner wall of the lower shell 7, and the other end of the corrugated pipe 11 is fixedly connected with one end of the movable guide rod 13 close to the auxiliary bracket 10. Under the action of the elasticity of the corrugated pipe 11, the auxiliary contact 8 is in contact communication with the incoming line static contact seat 4 and the outgoing line static contact base body 61 under a natural state, has a certain pressure, namely the contact self-closing force, and at the moment, the incoming line static contact seat 4 and the outgoing line static contact base body 61 are in a conducting state. Only when the brake is switched off, the operating mechanism drives the movable guide rod 13 to overcome the elasticity of the corrugated pipe 11 to move downwards, so that the acting of the operating mechanism can be greatly reduced, and the energy consumption is saved.
The upper shell 2 and the outgoing line static contact seat 6 made of insulating ceramic materials are subjected to metallization treatment before brazing, and the auxiliary bracket 10, the auxiliary contact base body 9 and the movable guide rod 13 which are made of the same high-strength low-density ceramic insulating materials are subjected to metallization treatment before brazing, so that the compact and firm connection of the auxiliary bracket, the auxiliary contact base body 9 and the movable guide rod 13 is guaranteed.
According to the double-break quick vacuum arc extinguish chamber, the guide device is driven by the external operating mechanism to enable the auxiliary contact to move up and down, the auxiliary contact is used for connecting and disconnecting the incoming line static contact seat and the outgoing line static contact base body, and the electrical on-off function of the vacuum arc extinguish chamber is realized; when the auxiliary contact is communicated, the wire inlet groove and the wire outlet groove are respectively in fit contact with the auxiliary contact, so that the switching-on bounce times and amplitude can be effectively reduced; the double-break structure improves the breaking capacity, reduces the opening distance of the contact, greatly shortens the running distance of the guide device, shortens the switching-on and switching-off time, improves the rapid switching-on and switching-off capacity, effectively ensures the service life of the auxiliary contact in the rapid switching-on and switching-off, inhibits and counteracts the bounce during switching-on, and improves the overall electrical performance and the mechanical life. The auxiliary contact and the guide device are light in weight, the same force of the operating mechanism is exerted, the initial speed is higher than that of the existing moving contact with large mass, the kinetic energy of closing collision is reduced, the damage degree of the contact is reduced, the service life of the contact is prolonged, the load capacity is strong, the temperature rise is low, the operation is stable and reliable, and the electric performance is good.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "upper", "lower", "outside", "inside" and the like in the description and claims of the present invention and the above drawings are used for distinguishing relative positions if any, and are not necessarily given qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A double-break quick vacuum arc-extinguishing chamber is characterized by comprising an upper shell (2), a lower shell (7), an incoming line guide rod (1), an outgoing line static contact seat (6) and a guide device, wherein the outgoing line static contact seat (6) is fixedly arranged between the upper shell (2) and the lower shell (7), an outgoing line static contact base body (61) is fixedly connected to the inner side of the outgoing line static contact seat, and an outgoing line groove (62) is formed in the outgoing line static contact base body (61); the incoming line guide rod (1) penetrates through the upper shell (2) and is fixedly connected with the upper shell (2), and the inner end of the incoming line guide rod (1) is connected with an incoming line static contact seat (4); the incoming line static contact seat (4) and the outgoing line static contact base body (61) are arranged at intervals, and an incoming line groove (41) is formed in the incoming line static contact seat (4); the guide device is slidably mounted on the lower shell (7), an auxiliary contact (8) matched with the wire inlet groove (41) and the wire outlet groove (62) is arranged at one end close to the wire inlet guide rod (1), the guide device drives the auxiliary contact (8) to move, and the wire outlet static contact base body (61) is communicated with or disconnected from the wire inlet static contact base (4); the outlet static contact seat (6) is of an annular structure, at least two static contact base bodies (61) are arranged, and the two static contact base bodies are uniformly distributed on the annular inner wall of the outlet static contact seat (6) at intervals.
2. Double-break fast vacuum interrupter according to claim 1, characterized by the fact that the incoming groove (41) and the outgoing groove (62) both present a V-shaped circumferential groove and are on the circumference of the same plane; the auxiliary contact (8) is in an annular structure matched with the circumferential groove.
3. Double-break fast vacuum interrupter according to claim 2, characterized in that the opening of the circumferential groove is right-angled and the auxiliary contact (8) is a right-angled bent plate-like structure fitting the circumferential groove.
4. Double-break fast vacuum interrupter according to claim 1, characterized in that the incoming stationary contact block (4) is fixedly connected to the upper housing (2) by means of a positioning pin (3).
5. Double-break fast vacuum interrupter according to claim 1, characterized by the fact that the surface of the incoming groove (41) and the outgoing groove (62) are covered with contact layer (5).
6. The double-break rapid vacuum interrupter as claimed in any one of claims 1 to 5, wherein the guiding device comprises an auxiliary contact base (9), an auxiliary bracket (10) and a movable guide rod (13), which are fixedly connected in sequence, the auxiliary bracket (10) is made of ceramic insulating material, the auxiliary contact (8) covers the surface of the auxiliary contact base (9), and the movable guide rod (13) penetrates through the lower housing (7) and is guided to slide through the lower housing (7).
7. Double-break fast vacuum interrupter according to claim 6, characterized in that a guiding sleeve (12) is fixedly mounted on the lower housing (7), and the movable guiding rod (13) is slidably inserted through the guiding sleeve (12).
8. Double-break fast vacuum interrupter according to claim 7, characterized in that the inside of the guiding sleeve (12) is provided with a guiding strip along the axial direction of the movable guiding rod (13), and the movable guiding rod (13) is provided with a sliding slot matching with the guiding strip.
9. A double-break quick vacuum interrupter as claimed in claim 6, wherein the movable guide rod (13) is sleeved with a bellows (11), one end of the bellows (11) is fixedly connected to the lower housing (7), and the other end of the bellows is fixedly connected to the end of the movable guide rod (13) close to the auxiliary bracket (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010773560.6A CN111952111B (en) | 2020-08-04 | 2020-08-04 | Double-fracture quick vacuum arc extinguish chamber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010773560.6A CN111952111B (en) | 2020-08-04 | 2020-08-04 | Double-fracture quick vacuum arc extinguish chamber |
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| CN111952111A CN111952111A (en) | 2020-11-17 |
| CN111952111B true CN111952111B (en) | 2022-08-05 |
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| CN114520128B (en) * | 2022-03-15 | 2023-09-22 | 山东正本电气有限公司 | Porcelain base structure of double-break vacuum arc-extinguishing chamber and double-break vacuum circuit breaker |
| CN115172095B (en) * | 2022-09-02 | 2023-03-24 | 清华大学 | Multi-contact arc extinguish chamber structure |
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| CN108428587A (en) * | 2018-04-09 | 2018-08-21 | 湖南斯德克智能开关有限公司 | A kind of vacuum direct current quick breaker |
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| CN108428587A (en) * | 2018-04-09 | 2018-08-21 | 湖南斯德克智能开关有限公司 | A kind of vacuum direct current quick breaker |
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