CN110197965B - Electric connector with shielding and self-locking functions applied to 30kV high-voltage equipment system - Google Patents

Electric connector with shielding and self-locking functions applied to 30kV high-voltage equipment system Download PDF

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Publication number
CN110197965B
CN110197965B CN201910478146.XA CN201910478146A CN110197965B CN 110197965 B CN110197965 B CN 110197965B CN 201910478146 A CN201910478146 A CN 201910478146A CN 110197965 B CN110197965 B CN 110197965B
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CN
China
Prior art keywords
shielding
conductor
socket
locking
shell
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Application number
CN201910478146.XA
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Chinese (zh)
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CN110197965A (en
Inventor
贾子朝
周小明
成成
高学林
张帆
王洪强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Milan Electrical And Mechanical Co ltd
Research Institute of Physical and Chemical Engineering of Nuclear Industry
Original Assignee
Hangzhou Milan Electrical And Mechanical Co ltd
Research Institute of Physical and Chemical Engineering of Nuclear Industry
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Priority to CN201910478146.XA priority Critical patent/CN110197965B/en
Publication of CN110197965A publication Critical patent/CN110197965A/en
Application granted granted Critical
Publication of CN110197965B publication Critical patent/CN110197965B/en
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Classifications

    • 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
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/187—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with spring member in the socket
    • 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
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • 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
    • H01R13/46—Bases; Cases
    • H01R13/502—Bases; Cases composed of different pieces
    • 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
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing
    • 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
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
    • 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
    • H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
    • H01R13/639—Additional means for holding or locking coupling parts together, after engagement, e.g. separate keylock, retainer strap
    • 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
    • H01R13/64—Means for preventing incorrect coupling
    • H01R13/641—Means for preventing incorrect coupling by indicating incorrect coupling; by indicating correct or full engagement
    • 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
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6581—Shield structure
    • 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
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/6592—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable
    • H01R13/6593—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable the shield being composed of different pieces
    • 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
    • H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
    • 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
    • H01R24/005—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure requiring successive relative motions to complete the coupling, e.g. bayonet type

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  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

The invention provides an electric connector with shielding and self-locking functions, which is applied to a 30kV high-voltage equipment system, and comprises a conductor assembly, an insulating assembly, a locking assembly and a shielding assembly; the appearance and the structure are round single-core direct-insertion locking type with a spring, the socket end flange can be vertically installed and connected with the outer surface of the equipment or the cavity, and the socket end is locked in a plug-in mode through hand-held or instrument operation; maximum overall dimension: the device can be held by one hand, and is plugged by both hands, locked and unlocked by rotating; a electromagnetic interference shielding function is carried out; operating voltage current: 30kv d.c.,30A; withstand voltage test: 50kV,5min. The invention can realize good circuit contact, safe and reliable insulation, continuous and stable shielding, simple and compact structure, light and rapid operation and convenient maintenance and replacement under severe environments such as electromagnetic radiation pollution.

Description

Electric connector with shielding and self-locking functions applied to 30kV high-voltage equipment system
Technical Field
The invention belongs to a high-voltage electric connector, and particularly relates to an electric connector with shielding and self-locking functions, which is applied to a 30kV high-voltage equipment system.
Background
The existing high-voltage circuit cable connection is fixedly connected, the connection part is protected on the installation site, standardized operation cannot be formed, whether the protection level meets the requirement is judged by an operator, and the standard is not uniform due to individual difference. To solve the disadvantage of not being able to standardize the operation, an electrical connector may be used for the connection. The high voltage electrical connector is a key component connecting the high voltage circuit with the high voltage equipment, which will affect the architecture and design of the overall system. The electric connector is produced and manufactured in factories, and is uniformly checked when leaving factories, so that the consistency can be effectively ensured. However, the insulation and voltage resistance of the current high-voltage electrical connector is generally less than 10000V, and the requirement of higher voltage cannot be met. Meanwhile, under severe environments such as electromagnetic radiation pollution, the existing high-voltage electric connector is easy to generate poor contact, and electromagnetic interference and the like.
Disclosure of Invention
The invention provides an electric connector with shielding and self-locking functions, which is applied to a 30kV high-voltage equipment system.
The technical scheme of the invention is as follows:
an electric connector with shielding and self-locking functions applied to a 30kV high-voltage equipment system comprises a conductor assembly, an insulation assembly, a locking assembly and a shielding assembly;
the conductor assembly comprises a contact finger spring which is arranged inside the conductor socket; the tail end of the conductor socket is in pressure connection with the cable, and the outer wall of one end of the conductor socket is connected with the equalizing ring at the tail part of the socket; the tail end of the conductor plug is spliced to the head end of the insulating sleeve at the flange side after being in crimping with the cable at the other side, and an outer clamping spring for limiting is arranged outside the tail end of the conductor plug;
the insulation assembly comprises a handheld side insulation sleeve and a spacing insulation sleeve which are sequentially arranged outside a cable at one side of the conductor socket from outside to inside, and the flange side insulation sleeve is arranged outside the cable at one side of the conductor plug;
wherein: an annular slot is formed on the end face of one end of the flange side insulating sleeve, which is close to the handheld side insulating sleeve, and the slot is matched with the handheld side insulating sleeve in a plugging manner;
the locking assembly comprises a handheld side shell, a locking shell and a locking shell, wherein the handheld side shell is sleeved outside the handheld side insulating sleeve, the locking shell is sleeved outside the handheld side shell, a spring is arranged between the handheld side shell and the locking shell, and an inner clamping spring is arranged inside the tail end of the locking shell;
the shielding component comprises a gram head adapter and a shielding gram head, and the tail ends of the hand-held side shell and the locking shell are respectively provided with the gram head adapter and the shielding gram head from inside to outside in sequence.
The conductor socket is a stepped shaft with a second-order stepped hole formed in the middle.
The contact finger spring is arranged in the small-diameter end stepped hole, and the cable is pressed into the small-diameter end stepped hole; the outer wall of the small-diameter section of the conductor socket is in threaded connection with the equalizing ring at the tail part of the socket.
One end of the interval insulating sleeve is contacted with the equalizing ring at the tail part of the socket; the inner wall of the handheld side insulating sleeve forms a limiting ring, and the end face of the large-diameter section of the conductor socket abuts against the limiting ring.
An outer convex ring is formed in the middle of the hand-held side shell; the inner wall of the middle part of the locking shell forms an inner convex ring, and the spring is positioned between the outer convex ring and the inner convex ring.
The flange is arranged outside the flange side shell;
the contact finger spring is made of copper alloy, and the rest conductor components are made of oxygen-free copper; the lock catch component is processed by adopting aluminum alloy except for the spring and the shielding component except for the shielding gram head, and the spring and the shielding gram head are made of stainless steel;
plating a layer of uniform, compact and smooth gold or silver on the surface of the conductor component;
and nickel plating is carried out on the surface of the lock catch assembly.
The corners of the conductor assembly and the parts contacting the conductor plug are provided with excessive fillets.
The electrical connector also includes a micro-switch for providing a mating signal of the connector to the system, which is disposed outside the flange-side housing by a bracket.
The electric connector also comprises a socket and a protective cover, wherein the socket and the protective cover are used for protecting the conductor plug when equipment is overhauled or the connector is not inserted, and the conductor plug, the socket and the protective cover are sleeved in sequence from inside to outside.
The beneficial effects of the invention are as follows:
the invention provides an electric connector with shielding and self-locking functions, which is applied to a 30kV high-voltage equipment system, is suitable for realizing electric connection and transmission between high-voltage equipment and an external circuit under the comprehensive environment condition of electromagnetic rays, and is a circular single-core direct-plug locking type electric connector with a spring, a socket end flange can be vertically installed and connected with the outer surface of the equipment or a cavity, and a socket end is locked in a plug-in mode of hand-held or instrument operation; the device can be held by one hand, and is plugged by both hands, locked and unlocked by rotating; a electromagnetic interference shielding function is carried out; operating voltage current: 30kv d.c.,30A; withstand voltage test: 50kV,5min.
Besides meeting the basic technical requirements of rated working voltage and current, the invention can realize good circuit contact, safe and reliable insulation, continuous and stable shielding, simple and compact structure, light and rapid operation and convenient maintenance and replacement under severe environments such as electromagnetic radiation pollution.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1;
FIG. 3 is a cross-sectional view of the present invention;
FIG. 4 is a perspective view of the invention in an uninstalled or service condition;
FIG. 5 is a cross-sectional view taken along the direction B-B in FIG. 4
Wherein:
1. contact finger spring 2 conductor socket
3. Equalizing ring at tail of conductor plug 4 socket
5. Hand-held side insulating sleeve 6 flange side insulating sleeve
7. Handheld side shell of spacing insulating sleeve 8
9. Flange side casing 10 locking casing
11. Spring 12 flange
13. Gram head adapter 14 support
15. Micro-switch 16 shielding gram head
17. Inner clamping spring 18 and outer clamping spring
19. Socket 20 protective cover
21. Cable 22 slot
23. Spacing ring 24 outer convex ring
25. Convex ring in groove 26
27. A clamping groove.
Detailed Description
The following describes in detail an electrical connector with shielding and self-locking functions applied to a 30kV high-voltage equipment system according to the embodiments of the invention with reference to the drawings in the specification:
example 1
As shown in fig. 1 to 3, an electrical connector with shielding and self-locking functions applied to a 30kV high voltage equipment system comprises a conductor assembly, an insulation assembly, a locking assembly and a shielding assembly.
The conductor assembly comprises a contact finger spring 1, a conductor socket 2, a conductor plug 3 and a socket tail equalizing ring 4;
the contact finger spring 1 is arranged inside the conductor socket 2; the tail end of the conductor socket 2 is in pressure connection with the cable 21, and the outer wall of the small-diameter end is in threaded connection with the equalizing ring 4 at the tail part of the socket; the tail end of the conductor plug 3 is in pressure connection with the cable 21 at the other side, the conductor plug is arranged at the head end of the insulating sleeve 6 at the flange side, and an outer clamping spring 18 for limiting is arranged outside the conductor plug;
the conductor socket 2 is limited in the handheld side insulating sleeve 5 by the spacing insulating sleeve 7, and the conductor plug 3 is limited by the flange side insulating sleeve 6 and the outer clamping spring 18.
Wherein:
the conductor socket 2 is a stepped shaft with a second-order stepped hole formed in the middle;
the contact finger spring 1 is arranged in the small-diameter end stepped hole, and the cable 21 is pressed into the small-diameter end stepped hole; the outer wall of the small-diameter section of the conductor socket 2 is in threaded connection with a equalizing ring 4 at the tail part of the socket;
the contact finger spring 1 is made of copper alloy, the conductor socket 2, the conductor plug 3 and the socket tail equalizing ring 4 are made of oxygen-free copper, and the surfaces of the contact finger spring and the socket tail equalizing ring are plated with a layer of uniform, compact and smooth gold or silver. The plating layer reduces the adsorption of gas dust, thereby improving the breakdown voltage of the air gap.
The insulation assembly comprises a handheld side insulation sleeve 5, a flange side insulation sleeve 6 and a spacing insulation sleeve 7;
the handheld side insulating sleeve 5 and the interval insulating sleeve 7 are sequentially arranged outside the cable 21 at one side of the conductor socket 2 from outside to inside; the flange side insulating bush 6 is provided outside the cable 21 on the side of the conductor plug 3;
wherein: one end of the interval insulating sleeve 7 is contacted with the equalizing ring 4 at the tail part of the socket; the inner wall of the handheld side insulating sleeve 5 forms a limiting ring 23, and the end face of the large-diameter section of the conductor socket 2 abuts against the limiting ring 23; an annular slot 22 is formed on the end face of the flange side insulating sleeve 6 close to the handheld side insulating sleeve 5, and a head part for plugging the conductor plug 3 is formed in the middle of the end; the slot 22 is matched with the handheld side insulating sleeve 5;
the hand-held side insulating bush 5 is inserted into place with the flange side insulating bush 6.
The lock catch assembly comprises a hand-held side shell 8, a flange side shell 9, a locking shell 10 and a spring 11;
the hand-held side shell 8 is sleeved outside the hand-held side insulating sleeve 5, an outer convex ring 24 is formed in the middle of the hand-held side shell, and a groove 25 is formed in the outer wall of the head end; the locking shell 10 is sleeved outside the handheld shell 8, and the outer convex ring 24 is arranged on the inner side of the locking shell 10; an inner convex ring 26 is formed on the inner wall of the middle part of the locking shell 10, an installation groove is formed on the inner wall of the tail end, and an inner clamping spring 17 is arranged in the installation groove; a spring 11 is arranged between the hand-held side shell 8 and the locking shell 10, and the spring 11 is positioned between the outer convex ring 24 and the inner convex ring 26; the inner clamp spring 17 is positioned on one side of the outer convex ring 24 away from the spring 11; the flange side shell 9 is sleeved outside the flange side insulating sleeve 6, and an annular clamping groove 27 is formed in the middle of the flange side shell; the flange 12 is arranged outside the flange side shell 9;
the shielding assembly comprises a gram head adapter 13 and a shielding gram head 16, and the hand-held side shell 8 and the locking shell 10 are also used as part of the shielding assembly;
the tail ends of the hand-held side shell 8 and the locking shell 10 are respectively provided with a gram head adapter 13 and a shielding gram head 16 from inside to outside.
The lock catch assembly is processed by aluminum alloy except the spring 11 and the shielding assembly except the shielding gram head 16, and the spring 11 and the shielding gram head 16 are made of stainless steel;
and nickel plating is carried out on the surface of the lock catch assembly.
The corners of the conductor assembly and the parts contacting the conductor plug 3 are provided with excessive rounded corners.
Example 2
As shown in fig. 1 to 3, the electrical connector further includes a micro switch 15 for providing a plugging signal of the connector to the system, and the micro switch is disposed outside the flange-side housing 9 through a bracket 14.
Example 3
As shown in fig. 4 and 5, the electrical connector further includes a socket 19 and a protective cover 20 for protecting the conductor plug 3 when the equipment is overhauled or the connector is not inserted, and the conductor plug 3, the socket 19 and the protective cover 20 are sleeved in sequence from inside to outside.
The invention has the following effects:
1. conductor properties: the conductor component is made of copper alloy or oxygen-free copper, and silver plating process treatment is carried out on the surface, so that the conductor resistance is reduced and oxidation is prevented. The contact finger spring 1 enables the inner walls of the conductor socket 2 and the conductor plug 3 to be tightly combined, so that the contact resistance is effectively reduced, and the heating is reduced; the conductor plug 3 is coated with a small amount of grease to ensure a relatively stable contact resistance with little wear over the designed plug life. The metal piece is simple and compact in structure, the outer diameter of the metal piece is basically the same as that of the cable, the structure of the insulating piece is uniform, the appearance surface is smooth, the electric field is uniformly distributed, and the risk of air gap breakdown is effectively reduced.
2. Insulation properties: the handheld side insulating sleeve 5, the flange side insulating sleeve 6 and the interval insulating sleeve 7 are made of polyether-ether-ketone materials with excellent comprehensive performance, so that the insulating thickness can be reduced; the handheld side insulating sleeve 5 and the flange side insulating sleeve 6 form a multi-layer insulating structure at the conductor, the product size is reduced under the condition of ensuring the creepage distance, the interval insulating sleeve 7 is contradictory between miniaturization of the product and increase of the creepage distance, so that the creepage distance can only be calculated according to the straight line distance, overall structure of the insulating sleeve is relatively regular and compact, smooth and smooth surface quality can be easily realized through machining, and risks of air gap breakdown and partial discharge are effectively reduced.
3. The locking performance: the lock shell 10 is provided with a lock catch which can slide in a groove of the hand-held side shell 8, the lock catch is ejected under the action of the spring 11, when the lock shell 10 is required to be inserted and locked, the lock catch is only required to be aligned with lock teeth of the flange side shell 9, the lock catch can be rotated clockwise after being ejected to the bottom, the lock catch in place can be ejected to the original position by the spring and has a slamming sound, the lock catch indicates that the lock shell 10 is required to be slid back to the bottom when the lock catch is unlocked, and meanwhile, the connector can be pulled out by rotating the hand-held side shell 8 anticlockwise. The lock catch structure is safe and reliable, and the operation is simple and easy.
4. Shielding performance: the cable shielding layer is connected with the cable shielding layer through the holding side shell 8, the flange side shell 9, the gram head adapter 13 and the shielding gram head 16. The shielding layer shrapnel is arranged in the shielding gram head 16 and connected with the shielding layer of the cable, and the shielding layer is continuous and stable.
5. And (3) mounting and fixing: after shielding the glans 16, glan adapter 13 and each insulating sleeve, the cable and the conductor assembly plug are subjected to cold compression joint, and then fixed by adopting a snap spring or a spacer sleeve. The through spring 11 is firstly placed in the locking shell 10, then the inner clamping spring 17 is placed in the groove, the flange plate 12 and the micro switch 15 can be connected with the flange side shell 9 (equipment shell) through bolts, and the whole installation can be completed only by the inner hexagon and the crimping pliers in the whole process, so that the installation is simple and easy, and the assembly efficiency is improved.
The electric connector is in a circular single-core direct-insertion locking type with a spring in shape and structure, a socket end flange can be vertically installed and connected with the outer surface of equipment or a cavity, and a socket end is locked in a plug-in mode through hand-held or instrument operation; maximum overall dimension: the device can be held by one hand, and is plugged by both hands, locked and unlocked by rotating; a electromagnetic interference shielding function is carried out; operating voltage current: 30kv d.c.,30A; withstand voltage test: 50kV,5min.
The electric connector provided by the invention adopts special engineering insulating materials and a multi-layer insulating structure to design to meet two indexes of voltage resistance and creepage distance, ensures that the electric field strength required by the design can be borne in the using process of the whole connector, has higher dielectric strength, surface and volume resistance, lower dielectric constant and good corona resistance, simultaneously has excellent physical and chemical properties (compact and small-hole-free bubbles in the interior), mechanical properties (high strength, good toughness, fatigue resistance and weather resistance), thermal properties (stable size at high and low temperatures) and the like, and is manufactured by adopting advanced precision machining detection equipment such as CNC (computer numerical control) and the like, so that air gaps are reduced or even eliminated as much as possible, and air gap breakdown and partial discharge are reduced; the conductor contact adopts conductor materials (such as high-purity copper) meeting the through-flow requirement and designs the corresponding hole shaft diameter according to calculation, a layer of even, compact and smooth gold or silver is plated on the surface of the conductor contact to reduce the adsorption of gas dust, so that the breakdown voltage of an air gap is improved, on the other hand, the conductor and the contact thereof in the application avoid sharp corners as much as possible in structural design, and proper excessive round corners are designed in a key part through simulation, so that the electric field distribution in the connector is as uniform as possible, the local electric field intensity is reduced, and the integral voltage-resistant capability is improved; the design of the shell which is made of aluminum alloy needs to meet the requirements of small and light man-machine engineering, and the other shell is used as a part of the lock catch and finally has the electromagnetic shielding function.
According to the invention, through combination of electric field theoretical calculation verification and experience accumulation, special designs are made on aspects of conductor insertion structure and surface treatment, insulation material selection and structure, safety locking structure, product installation technology and the like, novel insulation material and excellent conductor material are selected, precision machining means and surface treatment technology are adopted, the basic requirements of rated working voltage and current of equipment circuits 30kV and 30A are met, the 50kV direct current high voltage 5min no-break test and the 30kV long-time operation test are passed, and convenience and reliability of connection and transmission between circuit equipment are ensured.
The invention can be installed in equipment systems with different purposes according to different voltage levels and operation convenience requirements, and has strong applicability; the high-voltage transmission device is compatible with direct current high-voltage transmission of 30kV and below 30kV, and has good electrical safety and reliability; the socket section flange and the bolts can be in butt joint with the panel of the equipment to realize quick installation connection; the shell is connected with a good shielding layer of the cable, so that the use scene with electromagnetic interference phenomenon is met; the double-hand plugging operation is simple and convenient, the locking or the separation can be realized by pushing the spring to rotate the lock catch, and the locking mode is safe and reliable; when the plug is not connected, the protective cover can be used for protecting the socket end, so that the damage caused by misoperation is prevented.

Claims (9)

1. An electric connector with shielding and self-locking functions applied to a 30kV high-voltage equipment system is characterized in that: the shielding device comprises a conductor assembly, an insulation assembly, a locking assembly and a shielding assembly;
the conductor assembly comprises a contact finger spring (1) which is arranged inside the conductor socket (2); the tail end of the conductor socket (2) is in pressure connection with the cable (21), and the outer wall of one end of the conductor socket is connected with the equalizing ring (4) at the tail part of the socket; the tail end of the conductor plug (3) is connected with the cable (21) at the other side in a splicing way after being in compression joint with the head end of the insulating sleeve (6) at the flange side, and an outer clamping spring (18) for limiting is arranged outside the tail end of the conductor plug;
the insulation assembly comprises a handheld side insulation sleeve (5) and an interval insulation sleeve (7) which are sequentially arranged outside a cable (21) at one side of the conductor socket (2) from outside to inside, and a flange side insulation sleeve (6) is arranged outside the cable (21) at one side of the conductor plug (3);
wherein: an annular slot (22) is formed on the end face of one end, close to the handheld side insulating sleeve (5), of the flange side insulating sleeve (6), and the slot (22) is matched with the handheld side insulating sleeve (5) in an inserting mode;
the lock catch assembly comprises a hand-held side shell (8), a flange side shell (9), a locking shell (10) and a spring (11);
the handheld side shell (8) is sleeved outside the handheld side insulating sleeve (5), an outer convex ring (24) is formed in the middle of the handheld side shell, and a groove (25) is formed in the outer wall of the head end; the locking shell (10) is sleeved outside the handheld side shell (8), and the outer convex ring (24) is arranged on the inner side of the locking shell (10); an inner convex ring (26) is formed on the inner wall of the middle part of the locking shell (10), an installation groove is formed on the inner wall of the tail end, and an inner clamping spring (17) is arranged in the installation groove; a spring (11) is arranged between the hand-held side shell (8) and the locking shell (10), and the spring (11) is positioned between the outer convex ring (24) and the inner convex ring (26); the inner clamping spring (17) is positioned at one side of the outer convex ring (24) away from the spring (11); the flange side shell (9) is sleeved outside the flange side insulating sleeve (6), and an annular clamping groove (27) is formed in the middle of the flange side shell;
the shielding assembly comprises a gram head adapter (13) and a shielding gram head (16), and the tail ends of the hand-held side shell (8) and the locking shell (10) are respectively provided with the gram head adapter (13) and the shielding gram head (16) from inside to outside in sequence.
2. The electrical connector with shielding and self-locking functions for use in a 30kV high voltage equipment system of claim 1, wherein: the conductor socket (2) is a stepped shaft with a second-order stepped hole formed in the middle.
3. The electrical connector with shielding and self-locking functions for use in a 30kV high voltage equipment system according to claim 1 or 2, wherein: the contact finger spring (1) is arranged in the small-diameter end stepped hole, and the cable (21) is connected into the small-diameter end stepped hole in a crimping manner; the outer wall of the small-diameter section of the conductor socket (2) is in threaded connection with a grading ring (4) at the tail part of the socket.
4. The electrical connector with shielding and self-locking functions for use in a 30kV high voltage equipment system of claim 1, wherein: one end of the interval insulating sleeve (7) is contacted with the equalizing ring (4) at the tail part of the socket; the inner wall of the handheld side insulating sleeve (5) forms a limiting ring (23), and the end face of the large-diameter section of the conductor socket (2) abuts against the limiting ring (23).
5. The electrical connector with shielding and self-locking functions for use in a 30kV high voltage equipment system of claim 1, wherein: a flange (12) is arranged outside the flange side shell (9).
6. The electrical connector with shielding and self-locking functions for use in a 30kV high voltage equipment system of claim 1, wherein:
the contact finger spring (1) is made of copper alloy, and the rest conductor components are made of oxygen-free copper; the lock catch assembly is processed by aluminum alloy except the spring (11) and the shielding assembly except the shielding gram head (16), and the spring (11) and the shielding gram head (16) are made of stainless steel;
plating a layer of uniform, compact and smooth gold or silver on the surface of the conductor component;
and nickel plating is carried out on the surface of the lock catch assembly.
7. The electrical connector with shielding and self-locking functions for use in a 30kV high voltage equipment system of claim 1, wherein: the corners of the conductor assembly and the parts contacted with the conductor plug (3) are provided with excessive fillets.
8. The electrical connector with shielding and self-locking functions for a 30kV high voltage device system according to any one of claims 1 to 7, wherein: the electrical connector further comprises a microswitch (15) for providing a plugging signal of the connector to the system, which is arranged outside the flange-side housing (9) by means of a bracket (14).
9. The electrical connector with shielding and self-locking functions applied to a 30kV high-voltage equipment system according to one of claims 1 to 8, wherein: the electric connector further comprises a socket (19) and a protective cover (20) which are used for protecting the conductor plug (3) when equipment is overhauled or the connector is not inserted, and the conductor plug (3), the socket (19) and the protective cover (20) are sleeved in sequence from inside to outside.
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