CN111696820A - Vacuum arc-extinguishing chamber and pole-mounted switch - Google Patents
Vacuum arc-extinguishing chamber and pole-mounted switch Download PDFInfo
- Publication number
- CN111696820A CN111696820A CN202010587479.9A CN202010587479A CN111696820A CN 111696820 A CN111696820 A CN 111696820A CN 202010587479 A CN202010587479 A CN 202010587479A CN 111696820 A CN111696820 A CN 111696820A
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- pole
- contact
- electric pole
- contact disc
- vacuum interrupter
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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
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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
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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
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
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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
- H01H33/666—Operating arrangements
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The application relates to the field of vacuum switches of power distribution systems, in particular to a vacuum arc extinguish chamber and a pole-mounted switch. The vacuum arc extinguish chamber comprises a shell, a spring mounting rack, a first electric pole and a second electric pole, wherein a boss is arranged at the second end of the second electric pole, a spring is arranged between the boss and the spring mounting rack, the spring is sleeved on the second electric pole, when the switch-on work is executed, the second electric pole generates strong vibration when the first electric pole and the second electric pole collide with each other, the spring can prolong the absorption time of the second electric pole receiving the impact, reduce the impact force instantly born by the first end of the second electric pole, reduce the impact between the first end of the first electric pole and the first end of the second electric pole, and the whole vibration of the vacuum arc extinguish chamber is caused, meanwhile, because the absorption time of the impact of extension to the second pole has increased the first pole and the second pole between the first end after the static pressure of stability, improve the first pole and the second pole between the first end contact quality.
Description
Technical Field
The application relates to the field of vacuum switches of power systems, in particular to a vacuum arc extinguish chamber and a pole-mounted switch.
Background
The vacuum arc-extinguishing chamber is a core component of the vacuum switch, corresponding parts are sealed into a sealed vacuum chamber by adopting a vacuum brazing process, and arc can be quickly extinguished and current can be inhibited after a power supply is cut off by virtue of excellent vacuum insulation performance and arc extinguishing performance.
The vacuum arc-extinguishing chamber is completed by closing or separating a pair of opposite contacts in the vacuum arc-extinguishing chamber through an operating mechanism positioned outside the vacuum arc-extinguishing chamber. The shell is made of inorganic insulating materials such as ceramics, and is cylindrical, and two ends of the shell are sealed by a metal cover plate to form a closed container; the inside of the device is provided with a pair of moving and static contacts, the static contact is fixed on the static conducting rod, and the moving contact is fixed on the moving conducting rod. The corrugated pipe is sealed between the movable conducting rod and the metal cover plate, and the movable conducting rod can move axially to drive the contact to complete the closing and opening actions.
Vacuum interrupter carries very big operating current, in order to guarantee the good contact of contact, exert very big power on the contact, it is corresponding, vacuum interrupter break-make in-process, because the static contact is relatively motionless, the moving contact collides with very big speed, like pounding down with the tup, make whole vacuum interrupter bear very big impact force, this huge impact force often causes vacuum interrupter wholly to produce violent vibration, the working life of other spare parts on the vacuum interrupter has been influenced greatly, some switching elements that can lead to supporting setting on the vacuum switch even produce the malfunction because of the vibration.
Disclosure of Invention
The application provides a vacuum interrupter and column switch for solve the in-process that exists among the prior art because break-make in the vacuum interrupter, the collision leads to the vacuum interrupter to vibrate between two contacts, thereby influences the technical problem of the working life of other parts on the vacuum interrupter.
In view of this, this application first aspect provides a vacuum interrupter, package vacuum interrupter includes casing, spring mounting bracket, first pole and second pole, the casing is all arranged in to the first end of first pole and second pole, but the first end relative movement contact of first pole and second pole or reverse movement part, spring mounting bracket installs on the casing, the second end of second pole passes outside insulating casing is located spring mounting bracket, the second of second pole is served and is equipped with the boss, be equipped with the spring between boss and the spring mounting bracket, the spring housing is established on the second pole.
Preferably, the first end of first pole is equipped with first contact dish, and the first end of second pole is equipped with the second contact dish, contact through first contact dish and second contact dish between first pole and the second pole.
Preferably, all be equipped with a plurality of recess and a plurality of arch on the terminal surface of first time contact dish and second contact dish, recess on the first pole with protruding looks adaptation on the second pole, arch on the first pole with recess looks adaptation on the second pole.
Preferably, the protrusions of the first contact disc and the protrusions of the second contact disc are concentric circular protrusions, and the grooves of the first contact disc and the grooves of the second contact disc are formed between every two adjacent protrusions.
Preferably, the first contact disc is concavely curved in axial cross-sectional profile and the second contact disc is convexly curved in axial cross-sectional profile.
Preferably, the housing comprises an insulating shell and a shielding cylinder, the shielding cylinder being disposed within the insulating shell.
Preferably, the insulating casing is provided with a limiting block, the spring mounting frame is provided with a limiting protrusion, the limiting block is matched with the limiting protrusion, and the spring mounting frame is installed on the insulating casing through the limiting block and the limiting protrusion.
Preferably, the first electric pole is a movable conducting rod, and the second electric pole is a static conducting rod.
Preferably, the height difference between adjacent grooves or projections on the first contact pad and the second contact pad is 0.5 mm to 5 mm.
Embodiments of the present application further provide a column switch comprising a vacuum interrupter as claimed in claims 1 to 9, the first conducting rod being connected with an insulating operating rod for operating the switching on or off of the first and second contact pads in the vacuum interrupter.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides a vacuum arc-extinguishing chamber, which comprises a shell, a spring mounting rack, a first electric pole and a second electric pole, a boss is arranged at the second end of the second electric pole, a spring is arranged between the boss and the spring mounting rack, the spring is sleeved on the second electric pole, when the switch-on work is executed, the second electric pole generates strong vibration when the first electric pole and the second electric pole collide with each other, the spring can prolong the absorption time of the second electric pole receiving the impact, reduce the impact force instantly born by the first end of the second electric pole, reduce the impact between the first end of the first electric pole and the first end of the second electric pole, and the whole vibration of the vacuum arc extinguish chamber is caused, meanwhile, because the absorption time of the impact of extension to the second pole has increased the first pole and the second pole between the first end after the static pressure of stability, improve the first pole and the second pole between the first end contact quality. The technical problem of the in-process that exists among the prior art because break-make in the vacuum interrupter, the collision leads to the vacuum interrupter to take place the vibration between two contacts to influence the working life of other parts on the vacuum interrupter is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural view of a vacuum interrupter of embodiment 1;
fig. 2 is a schematic three-dimensional structure of a second contact pad in embodiment 1;
fig. 3 is a top view of a second contact pad in embodiment 1;
FIG. 4 is a cross-sectional view taken along plane A-A of FIG. 3;
fig. 5 is a schematic view of a separated state of the first contact pad and the second contact pad;
fig. 6 is a schematic view of a contact state of the first contact pad and the second contact pad;
fig. 7 is a schematic view of approximate calculation of the surface area of the first contact pad or the second contact pad in embodiment 1;
fig. 8 is another schematic structural view of the first contact pad and the second contact pad in embodiment 2;
fig. 9 is a schematic view of a pole top switch of embodiment 3.
In the drawings, the parts names represented by the respective reference numerals are listed as follows:
1. an insulating housing; 1-1, a limiting block; 2. a shielding cylinder; 3-1, a first electric pole; 3-1-1, a first contact pad; 3-2, a second electric pole; 3-2-1, a second contact pad; 3-2-2, boss; 4-1, a first bellows; 4-2, a second corrugated pipe; 5-1, a first guide sleeve; 5-2, a second guide sleeve; 6. a spring; 7. a spring mount; 7-1, limiting bulges; A. a vacuum arc-extinguishing chamber; B. the operating pull rod is insulated.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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 protection scope of the present application.
For easy understanding, please refer to fig. 1, fig. 1 is a schematic structural diagram of a vacuum interrupter of embodiment 1; the embodiment 1 of the application provides a vacuum arc-extinguishing chamber, which comprises an insulating shell 1, a shielding cylinder 2, a first electric pole 3-1, a second electric pole 3-2 and a spring mounting rack 7; spring bracket 7 installs on insulating casing 1, first pole 3-1, second pole 3-2 and shielding section of thick bamboo 2 all arranges in insulating casing 1, first pole 3-1 and second pole 3-2's first end is all arranged in shielding section of thick bamboo 2, insulating casing 1 and shielding section of thick bamboo 2 casing as an organic whole, promptly the casing includes insulating casing and shielding section of thick bamboo, shielding section of thick bamboo sets up in the insulating casing.
The first ends of the first electric pole 3-1 and the second electric pole 3-2 can be in relative movable contact or reversely moved to be separated, the first ends of the first electric pole 3-1 and the second electric pole 3-2 are equally connected with external equipment respectively, when the first ends of the first electric pole 3-1 and the second electric pole 3-2 are in contact, current can flow through the first electric pole 3-1 and the second electric pole 3-2, when a fault occurs and tripping is needed, the first ends of the first electric pole 3-1 and the second electric pole 3-2 relatively reversely move to separate the first ends of the first electric pole 3-1 and the second electric pole 3-2, the second end of the second electric pole 3-2 passes through the insulating shell 1 to be positioned outside the spring mounting rack 7, the second electric pole 3-2 is provided with a boss 3-2-2 at the position of the insulating shell 1 between the spring mounting racks 7, and a spring 6 is arranged between the boss 3-2-2 and the spring mounting rack 7, and the spring 6 is sleeved on the second electric pole 3-2. The spring 6 is arranged in the insulating spring mounting frame 7, one end of the spring 6 abuts against the boss 3-2-2, the other end of the spring 6 abuts against the shell of the spring mounting frame chamber 7, the spring mounting frame 7 is provided with a limiting protrusion 7-1, the position of the insulating shell 1, which is matched with the spring mounting frame 7, is provided with a limiting block 1-1, the limiting block 1-1 is matched with the limiting protrusion 7-1, and the spring mounting frame 7 is arranged on the insulating shell through the limiting block 1-1 and the limiting protrusion 7-1.
When the switch-on work is executed, the second electric pole 3-2 generates strong vibration when the first electric pole 3-1 and the second electric pole 3-2 collide with each other, the spring can prolong the absorption time of the second electric pole 3-2 receiving the impact, the impact force born by the first end of the second electric pole 3-2 instantly is reduced, the impact between the first electric pole 3-1 and the first end of the second electric pole 3-2 is reduced, the whole vibration of the vacuum arc extinguish chamber is caused, meanwhile, the stable static pressure between the first electric pole 3-1 and the first end of the second electric pole 3-2 is increased due to the fact that the absorption time of the impact on the second electric pole 3-2 is prolonged, and the contact quality between the first electric pole 3-1 and the first end of the second electric pole 3-2 is improved. The technical problem of the in-process that exists among the prior art because break-make in the vacuum interrupter, the collision leads to the vacuum interrupter to take place the vibration between two contacts to influence the working life of other parts on the vacuum interrupter is solved.
Referring to fig. 2-6, the end of the first pole 3-1 is provided with a first contact pad 3-1-1, the end of the second pole 3-2 is provided with a second contact pad 3-2-1, a plurality of concentric grooves and bulges are arranged on the first contact disc 3-1-1 and the second contact disc 3-2-1, the cross section profiles of the grooves and the bulges are circular arc-shaped, the grooves and the bulges are alternately distributed and smoothly transited, the groove on the first pole 3-1 is matched with the bulge on the second pole 3-2, the last arch of first pole 3-1 with recess looks adaptation on the second pole, contact through first contact dish 3-1-1 and second contact dish 3-2-1 between first pole 3-1 and the second pole 3-2.
The first contact disc 3-1-1 and the second contact disc 3-2-1 are concentric circular-ring-shaped bulges, grooves of the first contact disc 3-1-1 and the second contact disc 3-2-1 are formed between every two adjacent bulges, the grooves of the first contact disc 3-1-1 and the second contact disc 3-2-1 are in a concave arc shape along the axial section contour, and the bulges of the first contact disc 3-1-1 and the second contact disc 3-2-1 are in a convex arc shape along the axial section contour.
The contact of the vacuum switch generally carries a large current, theoretically, the larger the contact area of the contact is, the smaller the contact resistance on the contact surface is, which is more beneficial to reducing the contact temperature and further improving the service life of the contact.
In the embodiment, the first contact pad 3-1-1 is contacted with the second contact pad 3-2-1 through the matched groove and the matched bulge, so that the contact area is increased, the contact resistance is favorably reduced, and the temperature of the contact part is further reduced; secondly, when the first contact disc 3-1-1 and the second contact disc 3-2-1 are contacted with the protrusions through the matched grooves and the matched protrusions, the contact area is increased, the impact force per unit contact area is reduced for the same closing impact force, the service life is prolonged, and the noise is reduced. And thirdly, the arrangement of the mutually matched grooves and protrusions ensures that the first contact disc 3-1-1 and the second contact disc 3-2-1 have an automatic guiding function after being contacted, the concentricity of the first contact disc 3-1-1 and the second contact disc 3-2-1 is ensured, in addition, the mutually matched grooves and protrusions also increase the contact area of the first contact disc 3-1-1 and the second contact disc 3-2-1, and the capacity of the contact for bearing large current is improved.
Wherein, as shown in fig. 6, 2 circles of grooves and 2 circles of protrusions are provided, the number of the grooves and the protrusions cannot be set too much, the pitch of the adjacent grooves and the adjacent protrusions is ensured to be larger than the maximum eccentric amount of the first electric pole 3-1 and the second electric pole 3-2, and the occurrence of the protrusion to the protrusion when the electric poles are contacted is avoided.
First pole 3-1 is for moving the pole, second pole 3-2 is static conducting rod, first pole 3-1 cover is established in first bellows 4-1, and second pole 3-2 cover is established in second bellows 4-2, first pole 3-1 still cover is established in first uide bushing 5-1, second pole 3-2 cover is established in second uide bushing 5-2. The first electric pole 3-1 moves or is far away from the second electric pole 3-2, and the impact force brought by the first electric pole 3-1 is buffered through the second electric pole 3-2 serving as a static conductive pole, so that the vibration of the vacuum arc extinguish chamber can be effectively reduced.
As shown in fig. 7, the height difference between the adjacent grooves or projections on the first contact pad 3-1-1 and the second contact pad 3-2-1 is 0.5 mm to 5 mm. In the case where the first contact pad 3-1-1 and the second contact pad 3-2-1 are both circular discs having a diameter D of 100mm and the height difference h between adjacent projections and grooves is 5mm, the areas of the first contact pad 3-1-1 and the second contact pad of the prior art are both pi r2 of 7850mm2The protrusions and the grooves are approximately regarded as triangles for calculation, namely, the arcs ab, bc, cd and de are approximately regarded as straight line segments ab, bc, cd and de, and the straight line segments bc, cd and de are translated and/or mirrored to obtain equivalent straight line segments ae', so that after the protrusions and the grooves are arranged on the first contact disc 3-1-1 and the second contact disc 3-2-1, the surface areas of the first contact disc 3-1-1 and the second contact disc 3-2-1 are approximately equal to the side area of a cone with the height of 4h and the diameter of the bottom of 100mm, and the specific area is calculated to be 8454mm2The contact area is increased by 7.8% compared to the planar contact, and the area increase rate is higher if the ring grooves are increased.
The electric poles with different capacities and scales are selected to be suitable for concave-convex difference, and besides the effect, the electric pole has an automatic guiding effect in contact, so that the concentricity of the first electric pole 3-1 and the second electric pole 3-2 can be effectively ensured.
Example 2:
fig. 8 is a schematic view showing another structure of the first contact pad and the second contact pad in embodiment 2;
the first contact pad 3-1-1 and the second contact pad 3-2-1 are respectively concave arc-shaped and convex arc-shaped as a whole along the axial section profile. This structure makes it possible to further increase the contact area of the first contact pad 3-1-1 and the second contact pad 3-2-1, compared to embodiment 1.
Example 3
Referring to fig. 9, the pole-mounted switch of the present invention includes three sets of the vacuum interrupter a, the insulating operating rod B and the insulating elastic rod, the first pole 3-1 is connected to the insulating operating rod B through a lever structure, the second pole 3-2 is connected to the insulating elastic rod through a lever structure, the insulating operating rod B is used to operate the on/off of the first contact plate 3-1-1 and the second contact plate 3-2-1 in the vacuum interrupter, and the insulating elastic rod is used to limit the position of the second pole 3-2 and absorb the impact force when the first pole 3-1 collides with the second pole 3-2.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. The utility model provides a vacuum arc-extinguishing chamber, a serial communication port, vacuum arc-extinguishing chamber includes casing, spring mounting bracket, first pole and second pole, the casing is all arranged in to the first end of first pole and second pole, but the first end relative movement contact or the reverse movement of first pole and second pole separately, spring mounting bracket installs on the casing, the second end of second pole passes outside insulating casing is located spring mounting bracket, the second of second pole is served and is equipped with the boss, be equipped with the spring between boss and the spring mounting bracket, the spring housing is established on the second pole.
2. The vacuum interrupter according to claim 1, wherein the first end of the first pole is provided with a first contact disc, the first end of the second pole is provided with a second contact disc, and the first pole and the second pole are in contact with each other through the first contact disc and the second contact disc.
3. The vacuum arc-extinguishing chamber according to claim 2, characterized in that a plurality of grooves and a plurality of protrusions are arranged on the end faces of the first contact disc and the second contact disc, the grooves on the first electric pole are matched with the protrusions on the second electric pole, and the protrusions on the first electric pole are matched with the grooves on the second electric pole.
4. The vacuum interrupter as claimed in claim 3, wherein the protrusions of the first contact disc and the protrusions of the second contact disc are concentric circular protrusions, and the grooves of the first contact disc and the grooves of the second contact disc are formed between two adjacent protrusions.
5. Vacuum interrupter according to claim 4, characterized in that the first contact disc is concavely curved in axial cross-sectional profile and the second contact disc is convexly curved in axial cross-sectional profile.
6. The vacuum interrupter as claimed in claim 5, wherein the housing comprises an insulating housing and a shielding canister disposed within the insulating housing.
7. The vacuum interrupter as claimed in claim 6, wherein the insulating housing is provided with a limiting block, the spring mounting bracket is provided with a limiting protrusion, the limiting block is adapted to the limiting protrusion, and the spring mounting bracket is mounted on the insulating housing through the limiting block and the limiting protrusion.
8. The vacuum interrupter as claimed in claim 7, wherein the first pole is a moving conducting pole and the second pole is a static conducting pole.
9. Vacuum interrupter according to claim 8, characterized in, that the height difference between adjacent grooves or protrusions on the first contact disc and the second contact disc is 0.5 mm to 5 mm.
10. A column switch comprising a vacuum interrupter as claimed in any one of claims 1 to 9, wherein the first conducting rod is connected to an insulating operating rod for switching the first contact pad and the second contact pad on and off in the vacuum interrupter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010587479.9A CN111696820A (en) | 2020-06-24 | 2020-06-24 | Vacuum arc-extinguishing chamber and pole-mounted switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010587479.9A CN111696820A (en) | 2020-06-24 | 2020-06-24 | Vacuum arc-extinguishing chamber and pole-mounted switch |
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| Publication Number | Publication Date |
|---|---|
| CN111696820A true CN111696820A (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010587479.9A Pending CN111696820A (en) | 2020-06-24 | 2020-06-24 | Vacuum arc-extinguishing chamber and pole-mounted switch |
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| CN111009427A (en) * | 2018-10-06 | 2020-04-14 | 湖北港源电气有限公司 | Electrical contact assembly |
| CN109559933A (en) * | 2018-11-16 | 2019-04-02 | 吴长兰 | High-voltage switch device |
| CN109830400A (en) * | 2019-04-01 | 2019-05-31 | 湖北大禹汉光真空电器有限公司 | A kind of vacuum interrupter with high-cooling property |
| CN210722868U (en) * | 2019-12-13 | 2020-06-09 | 成都大学 | Power switch sealing structure |
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Application publication date: 20200922 |