CN114498212A - Connector for arc extinguishing during high-voltage live-line plugging - Google Patents
Connector for arc extinguishing during high-voltage live-line plugging Download PDFInfo
- Publication number
- CN114498212A CN114498212A CN202210091613.5A CN202210091613A CN114498212A CN 114498212 A CN114498212 A CN 114498212A CN 202210091613 A CN202210091613 A CN 202210091613A CN 114498212 A CN114498212 A CN 114498212A
- Authority
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- Prior art keywords
- contact
- arc extinguishing
- arc
- connector
- contact pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011810 insulating material Substances 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims 1
- 238000010891 electric arc Methods 0.000 abstract description 20
- 230000008033 biological extinction Effects 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000002955 isolation Methods 0.000 abstract description 2
- 239000000919 ceramic Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010494 dissociation reaction Methods 0.000 description 3
- 230000005593 dissociations Effects 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/10—Sockets for co-operation with pins or blades
- H01R13/11—Resilient sockets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
Abstract
The invention discloses a connector for arc extinction during high-voltage live-line plug-in and plug-out, which comprises a contact pin and a socket assembly, wherein the socket assembly comprises an insulating shell and an arc extinction assembly; the arc extinguishing assembly comprises an arc extinguishing unit, a spring and a contact; the contact is positioned in the insulating shell; a spring is embedded in the contact; a cavity is arranged in the contact; one end of the contact pin is an insulating section, and the other end of the contact pin is a conducting section; the conducting section of the contact pin penetrates through the cavity of the contact and extends to the contact spring; the insulating section of the contact pin, the arc extinguishing unit and the contact enclose an arc extinguishing slit which is of a closed space structure. The arc extinguishing unit is the baffle of insulating material, and this baffle is fixed and the parcel is at the tip of contact, and then makes to form the arc extinguishing slit between the insulating section of contact pin and arc extinguishing unit and the contact. The arc extinguishing slit structure is used for reducing the generated electric arc, and the insulation isolation and built-in design is used for blocking and reducing the leakage of the residual electric arc, so that the damage caused by the electric arc is reduced, and the electrical safety problem of the easy-to-draw arc when the high-voltage power is electrified and unplugged is solved.
Description
Technical Field
The invention relates to a connector in the field of high-voltage large-current connectors, in particular to a connector for arc extinction during high-voltage live-line insertion and extraction.
Background
The existing connecting interface generally adopts a copper sheet inserted sheet type contact structure, and has open type double-sided contact, and current carrying is in a normal range. The working voltage of the conventional interface is 220V, and electric arc flashover is easily generated during hot plugging. Any circuit above 50V may produce an arc flash. Arc flashover occurs due to air conduction. The main reason for this is that the two contacted live conductors, when separated again, ionize the air, thus creating an arc. The arc is mainly generated in the stroke of the contact with the broken circuit, the stroke space is filled with the electric ions, the quantity of the electric ions rapidly rises to form high temperature, the contact and the insulation are burnt by the high temperature, and the arc discharge phenomenon is more obvious particularly under the condition of direct-current high-voltage power supply.
The contact copper sheet of the existing interface is generally made of tin bronze or phosphor bronze, has small heat conductivity coefficient and heat capacity, and is easy to generate electric sparks during hot plugging. If the voltage is raised to 400V, the arc discharge phenomenon will be more serious. The existing interface has no insulating high-temperature-resistant isolating mechanism and cannot block electric arc leakage. The existing interface without arc extinguishing function and arc leakage blocking function has huge potential safety hazard when a high-voltage live plug is plugged. In severe cases, electric arcs even cause short circuit between phases and explosion of electric appliances, thereby causing fire and endangering the safety of personnel and equipment.
As shown in fig. 1, an internal structure of a conventional connection interface generally adopts a copper sheet insertion type contact structure, and is open-type double-sided contact. The contact copper sheet of the existing interface has small heat conductivity coefficient and heat capacity, and is not provided with an arc extinguishing design, so that electric arcs are easy to leak. When the high voltage live is plugged, huge potential safety hazards exist, and electrical fire and personal potential safety hazards are easy to generate.
Therefore, how to avoid the arc flashover from leaking out when the high voltage is plugged is a technical problem which needs to be solved urgently.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problem of the damage of arc flashover and leakage when a live plug is plugged under high voltage, the invention provides the connector for arc extinction when the live plug is plugged under high voltage.
The technical scheme is as follows: the connector for arc extinction during the high-voltage live-line plug-pull comprises a contact pin and a socket assembly, wherein the socket assembly comprises an insulating shell and an arc extinction assembly;
the arc extinguishing assembly comprises an arc extinguishing unit, a spring and a contact; the contact is positioned in the insulating shell; a spring is embedded in the contact; a cavity is arranged in the contact;
one end of the contact pin is an insulating section, and the other end of the contact pin is a conducting section; the insulation section and the conduction section of the contact pin are inserted into the cavity of the contact, and the conduction section is contacted with and penetrates through the spring;
the insulating section of the contact pin, the arc extinguishing unit and the contact enclose an arc extinguishing slit which is of a closed space structure.
The arc extinguishing unit is high pressure resistant high temperature resistant insulating material baffle, and this baffle is fixed and the parcel is at the tip of contact, and then makes to form the arc extinguishing slit between the insulating section of contact pin and arc extinguishing unit and the contact.
The baffle is made of high-pressure and high-temperature resistant insulating material.
An annular groove for accommodating the spring is further formed in the contact and is located below the insulating section of the contact pin.
An insulating sheath is fixed at one end of the contact pin to form an insulating section.
The insulating sheath is made of high-pressure-resistant and high-temperature-resistant materials.
The conducting section of the contact pin is made of metal.
The arc extinguishing unit is hermetically connected with the end part of the contact, surrounds the circumference of the insulating sheath, and forms an arc extinguishing closed cavity together with the inner wall of the contact and the insulating sheath.
The contact is made of high-temperature-resistant red copper.
The spring is an annular spring which is embedded in the contact, and specifically, the spring is pressed into the contact in an interference deformation mode.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) the arc extinguishing slit structure is used for reducing the generated electric arc, and the isolation and built-in design is adopted for blocking and reducing the leakage of the electric arc, so that the damage caused by the electric arc is reduced, the electrical safety problem that the electric arc is easy to be drawn under high voltage is solved, the function of low resistance and high current carrying is realized, the structure is simple, the safety and the reliability are realized, and the arc extinguishing slit structure is suitable for the application occasions of direct current high voltage of 220V or above.
(2) The invention adopts high temperature resistant metal with high melting point, large heat conductivity coefficient and heat capacity as contact material, reduces thermionic emission and metal vapor in electric arc, and plays a role in inhibiting dissociation; the contact pin and the contact are made of high-temperature-resistant materials such as red copper, and have the advantages of high melting point, large heat conductivity coefficient and thermal capacity, high corrosion resistance, and good arc resistance and fusion welding resistance.
(3) The electric arc generated in the invention moves in the slit of the medium, and on one hand, the electric arc is cooled, so that the dissociation removing effect is enhanced; on the other hand, the arc is lengthened, the arc diameter is reduced, the arc resistance is increased, and the arc is reduced.
(4) The invention adopts high-pressure resistant and high-temperature resistant insulating materials such as ceramics as the isolating arc-extinguishing baffle to isolate electric arcs and block the leakage of the electric arcs.
(5) The invention adopts the contact pin with the insulating sheath and the cylindrical plug-in contact structure, the contact pin is in circumferential contact with the spring, effective contact points are increased, the contact resistance is low, and the current-carrying effect is enhanced. Meanwhile, the contact pin, the contact and the arc extinguishing unit form a closed space, and the electric arc is prevented from leaking along the metal surface of the contact pin.
(6) The invention increases the electric clearance between the contact point of the contact pin and the operation end surface, adopts the high-pressure and high-temperature resistant insulating material to strengthen the insulation, and improves the operation safety of the product.
Drawings
FIG. 1 is a schematic diagram of a prior art connector configuration;
FIG. 2 is a schematic diagram of the connector for extinguishing arc during high voltage live insertion and extraction according to the present invention;
FIG. 3 is a schematic cross-sectional view of an arc suppressing slit according to the present invention;
FIG. 4 is a three-dimensional schematic view of an arc chute of the present invention;
fig. 5 is a schematic diagram of the position structure of the contact and the spring.
Detailed Description
As shown in fig. 2, the high voltage live-line plug-and-unplug arc extinguishing connector of the present invention includes a plug 1 and a socket assembly 2 including an insulating housing and an arc extinguishing assembly. Wherein the end of the pin 1 is provided with a metal pin 7.
The arc extinguishing assembly comprises an arc extinguishing unit 3, a spring 5 and a contact 6; the contact 6 is positioned in the insulating shell; a circular groove is formed in the contact 6, and the spring 5 is fitted into the circular groove. In this embodiment, the arc extinguishing unit 3 is made of a ceramic arc extinguishing baffle, and the contact 6 is made of a metal material, such as a red copper contact. The spring 5 is a ring spring, i.e. a stylus wire spring. The spring 5 is wound in a ring shape with a plurality of turns, and when the pin 7 is inserted into the spring 5, the pin makes a point contact with each turn of the spring.
The contact mode of the spring 5 and the contact 6 is circumferential encircling contact. A circle of annular groove is formed in the contact, the spring 5 is embedded into the annular groove in an interference mode, the circumference is in surrounding contact, effective contact points are increased, contact resistance is low, contact is reliable, and the current-carrying effect is enhanced.
One end of the contact pin 7 is an insulation section, the other end of the contact pin is a conduction section, the conduction section of the contact pin 7 is inserted into the cavity of the contact 6, and the conduction section is in contact with the spring 5, so that the conduction purpose is achieved. In this embodiment, the outer surface of the contact pin 7 is wrapped by the insulating sheath 4 to form an insulating section, the insulating sheath 4 is made of plastic, and the insulating sheath 4 is fixed on the contact pin 7 in a double injection molding manner. The contact pin 7 forms a small space with the insulating shell of the socket, the ceramic arc-extinguishing baffle 3 and the inner cavity of the contact 6 in the plugging process, and further plays a role in arc extinguishing and blocking the leakage of electric arcs. The conducting section of the contact pin 7 is made of high-temperature resistant metal material, such as red copper.
Wherein, the conducting section and the insulating section of the contact pin 7, the ceramic arc-extinguishing baffle 3 and the contact 6 enclose an arc-extinguishing slit which is of a closed space structure.
When the connector is installed, the annular spring in the socket assembly 2 is firstly installed in the contact, and then the contact and the ceramic arc extinguishing baffle are assembled to the socket together and locked by the screw. The ceramic arc-extinguishing baffle 3 is a high-pressure-resistant and high-temperature-resistant insulator, and the arc-extinguishing baffle 3 surrounds the periphery of the insulating sheath 4 and forms an arc-extinguishing closed cavity together with the inner wall of the contact 6 and the contact pin 7. The ceramic arc-extinguishing baffle 3 is of an annular structure, the middle round hole part is provided with a chamfer angle, and the ceramic arc-extinguishing baffle has the functions of forming a closed space for arc extinguishing and blocking the leakage of electric arc.
In this embodiment, the plug 1 is a three-hole plug, and is also applicable to a two-hole plug.
As shown in fig. 2 and 3, the annular spring 5 is pressed into the groove of the contact 6 by interference deformation. When the contact pin 7 is inserted into the red copper contact 6, the metal part of the contact pin 7 is contacted with the contact finger spring 5 to play a role in conduction; the insulating sheath 4 is only one section of the whole length of the contact pin 7, and is an insulating section, and the contact part of the lower part of the contact pin 7 and the contact finger spring is a metal conducting section.
The spring 5 is located below the insulating sheath 4. When the contact pin 7 is not inserted, the inner cavity of the red copper contact 6 is empty, and after the contact pin is inserted into the cavity of the red copper contact 6, the diameter of the contact pin 7 is close to that of the inner cavity of the red copper contact, so that the gap between the contact pin and the inner cavity of the red copper contact is small, and a slit is generated, specifically as shown in fig. 2, when the contact pin 7 is completely inserted into the contact 6 to generate the slit of the cross-sectional view, the ceramic arc-extinguishing baffle 3 and the contact 6 are in zero-gap fit. The ceramic arc-extinguishing baffle is made of high-pressure-resistant and high-temperature-resistant insulating materials, the outer part of the contact pin 7 is provided with the plastic insulating sheath 4, a gap between the insulating sheath 4 and the contact 6 is small, the gap is of a slit structure, and a slit space generated by the gap is of an annular closed structure.
Because the arc-extinguishing baffle and the insulating sheath 4 around the slit are made of insulating, high-pressure-resistant and high-temperature-resistant materials, the electric arc can only move in the closed slit, and on one hand, the electric arc is cooled, so that the dissociation removing effect is enhanced; on the other hand, the arc is elongated, the arc diameter is reduced, the arc resistance is increased, and the arc is extinguished. The electric arc is extinguished in a narrow closed cavity and cannot leak, so that potential safety hazards are avoided.
Since the ceramic arc-extinguishing baffle, the contact pin 7 and the contact 6 are all circular structures, the annular slit closed space shown in fig. 3 is formed, and the electric arc is cooled, dissociated and lost in the narrow closed space.
As shown in fig. 4, the ring spring 5 is fitted into the red copper contact 6, and when the pin 7 is in contact with the ring spring 5, conduction is established, and one side of the contact 6 is connected to the power line outlet portion.
Claims (10)
1. The utility model provides a connector of arc extinguishing when high voltage live wire is inserted and is pulled out which characterized in that: the contact pin type arc extinguishing socket comprises a contact pin (7) and a socket component (2), wherein the socket component (2) comprises an insulating shell and an arc extinguishing component;
the arc extinguishing assembly comprises an arc extinguishing unit (3), a spring (5) and a contact (6); the contact (6) is positioned in the insulating shell; the spring (5) is embedded in the contact (6); a cavity is formed in the contact (6);
one end of the contact pin (7) is an insulating section, and the other end of the contact pin is a conducting section; the insulation section and the conduction section of the contact pin (7) are inserted into the cavity of the contact (6), and the conduction section is in contact with and penetrates through the spring (5);
the contact pin (7), the arc extinguishing unit (3) and the contact (6) enclose an arc extinguishing slit which is of a closed space structure.
2. A high voltage hot plug arc extinguishing connector as claimed in claim 1, wherein: the arc extinguishing unit is a high-pressure and high-temperature resistant insulating material baffle, the baffle is fixed and wrapped at the end part of the contact (6), and the contact pin (7) penetrates through the arc extinguishing unit (3).
3. A high voltage hot plug arc extinguishing connector as claimed in claim 2, wherein: the baffle is made of high-pressure and high-temperature resistant insulating materials.
4. A high voltage hot plug arc extinguishing connector as claimed in claim 1, wherein: an annular groove for accommodating the spring (5) is further formed in the contact (6), and the annular groove is located below the insulating section of the contact pin (7).
5. A high voltage hot plug arc extinguishing connector as claimed in claim 1, wherein: and an insulating sheath (4) is fixed at one end of the contact pin (7) to form an insulating section.
6. The high-voltage hot-pluggable arc-extinguishing connector according to claim 5, wherein: the insulating sheath (4) is made of high-pressure and high-temperature resistant materials.
7. The connector for extinguishing arc during the hot-line insertion and extraction of high voltage according to claim 1, wherein the conducting section of the pin (7) is made of metal.
8. A high voltage hot plug arc extinguishing connector as claimed in claim 1, wherein: the arc extinguishing unit (3) is connected with the contact end in a sealing mode.
9. A high voltage hot plug arc extinguishing connector as claimed in claim 1, wherein: the contact (6) is made of high-temperature-resistant red copper.
10. A high voltage hot plug arc extinguishing connector as claimed in claim 1, wherein: the spring (5) is an annular spring which is embedded in the contact (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210091613.5A CN114498212A (en) | 2022-01-26 | 2022-01-26 | Connector for arc extinguishing during high-voltage live-line plugging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210091613.5A CN114498212A (en) | 2022-01-26 | 2022-01-26 | Connector for arc extinguishing during high-voltage live-line plugging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114498212A true CN114498212A (en) | 2022-05-13 |
Family
ID=81475347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210091613.5A Pending CN114498212A (en) | 2022-01-26 | 2022-01-26 | Connector for arc extinguishing during high-voltage live-line plugging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114498212A (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB423122A (en) * | 1933-09-26 | 1935-01-25 | Ellison George Ltd | Improvements relating to electric circuit interrupters with arc extinguishers |
| EP0054833A1 (en) * | 1980-12-09 | 1982-06-30 | Mitsubishi Denki Kabushiki Kaisha | Arc restricting device for a circuit breaker |
| JP2003249302A (en) * | 2001-02-02 | 2003-09-05 | Auto Network Gijutsu Kenkyusho:Kk | Low arcing connector |
| US20040100741A1 (en) * | 2000-09-18 | 2004-05-27 | Bosga Sjoerd G | Switching device |
| CN101000837A (en) * | 2006-01-13 | 2007-07-18 | 河南平高电气股份有限公司 | High voltage circuit breaker |
| CN103594280A (en) * | 2013-10-31 | 2014-02-19 | 西安交通大学 | Novel composite contact vacuum arc-extinguishing chamber and vacuum circuit breaker with same |
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| CN104143472A (en) * | 2013-09-30 | 2014-11-12 | 国家电网公司 | Air compression type arc extinction device and high-voltage circuit breaker with arc extinction device |
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| CN107680891A (en) * | 2017-10-31 | 2018-02-09 | 首瑞（天津）电气设备有限公司 | A kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system |
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| CN214753575U (en) * | 2021-06-29 | 2021-11-16 | 上海良信电器股份有限公司 | Arc extinguish chamber of direct current contactor and direct current contactor |
-
2022
- 2022-01-26 CN CN202210091613.5A patent/CN114498212A/en active Pending
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| US20040100741A1 (en) * | 2000-09-18 | 2004-05-27 | Bosga Sjoerd G | Switching device |
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| Title |
|---|
| 王学军, 陈德桂, 邱祖述, 周勇: "电弧在多纵缝灭弧室中运动和熄灭的试验研究", 低压电器, no. 06, pages 17 - 21 * |
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