CN113612066B - Sleeve thread electric connection device with adjustable contact area - Google Patents
Sleeve thread electric connection device with adjustable contact area Download PDFInfo
- Publication number
- CN113612066B CN113612066B CN202110972416.XA CN202110972416A CN113612066B CN 113612066 B CN113612066 B CN 113612066B CN 202110972416 A CN202110972416 A CN 202110972416A CN 113612066 B CN113612066 B CN 113612066B
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- Prior art keywords
- nut
- gear
- middle layer
- convex strip
- tooth groove
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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
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/627—Snap or like fastening
-
- 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
- H01R13/621—Bolt, set screw or screw clamp
- H01R13/6215—Bolt, set screw or screw clamp using one or more bolts
-
- 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
Landscapes
- Mechanical Control Devices (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a sleeve threaded electric connection device with adjustable contact area, which can change the height of a telescopic nut group through an adjusting knob so as to change the threaded connection contact area of a wiring terminal and a wiring seat and further adjust the current bearing capacity of a sleeve threaded electric connection structure. The device has simple structure and convenient operation, and can adjust the contact area of threaded connection; the structure is not required to be disassembled; can be adjusted before and during operation; the three-layer contact nut of the telescopic nut component can be selected to have proper height according to actual conditions; the contact nut has the clamping function, ensures that the device cannot slide, and has certain stability.
Description
Technical Field
The invention belongs to the technical field of bushing electric connection structures of electric equipment of a convertor station, and particularly relates to a bushing threaded electric connection device with an adjustable contact area.
Background
In recent years, a plurality of extra-high voltage converter transformer fires and burns, the extra-high voltage converter transformer fires rapidly, the burning time is long, the overfire area is large, serious economic loss is caused to a power grid, and in post-site inspection, the accident is found to be directly related to the current-carrying failure of the sleeve electric connection structure. Researches show that the failure of the sleeve electric connection structure can cause abnormal phenomena such as overheating and discharge faults, and the high-capacity converter transformer has the characteristics of large load current, high harmonic component, strong mechanical vibration, high operating temperature and the like, and the load current is more than 5000A and is far higher than the load current of a common power transformer. Failure of the electrical connection of the bushing is likely to lead to fire and explosion if under such high current carrying conditions.
The screw-type electric contact is relatively stable due to a certain pressure at the time of screw contact, and thus there is a problem in that the contact area adjustment thereof is relatively troublesome. The prior sleeve threaded electric connection device is not easy to change the threaded contact area, i.e. has no adjusting function. Therefore, the electric connection structure capable of adjusting the threaded contact surface is designed, and the stability of the whole device can be greatly improved.
Disclosure of Invention
The invention aims to overcome the defect that in a sleeve electric connection structure of a converter transformer in the prior art, the threaded contact area of threaded electric contact is not easy to adjust, and the current-carrying failure of the sleeve electric connection structure causes ignition, and provides a sleeve threaded electric connection device with adjustable contact area.
The invention adopts the following technical scheme:
the utility model provides a sleeve pipe screw thread electricity connecting device of adjustable area of contact which the key lies in: the connecting screw rod is sleeved with a telescopic nut group in a threaded manner;
the telescopic nut group comprises an inner layer contact nut, a middle layer contact nut and an outer layer contact nut which are overlapped and telescopic, the bottom of the outer layer contact nut is fixedly connected with the wiring terminal, the outer diameter of the inner layer contact nut is equal to the inner diameter of the middle layer contact nut, and the outer diameter of the middle layer contact nut is equal to the inner diameter of the outer layer contact nut;
an inner layer tooth groove convex strip is arranged on the outer wall of the inner layer contact nut, an inner layer convex strip mounting groove is arranged on the inner wall of the middle layer contact nut corresponding to the inner layer tooth groove convex strip, a middle layer tooth groove convex strip is arranged on the outer wall of the middle layer contact nut, and a middle layer convex strip mounting groove is arranged on the outer layer contact nut corresponding to the middle layer tooth groove convex strip;
the same operation rotary rod is horizontally and vertically arranged on the outer walls of the middle-layer contact nut and the outer-layer contact nut in a penetrating mode, an inner gear is arranged on the operation rotary rod corresponding to the inner-layer tooth groove convex strip, an outer gear is arranged on the operation rotary rod corresponding to the middle-layer tooth groove convex strip, the inner gear is located in the inner-layer convex strip installation groove and is in toothed connection with the inner-layer tooth groove convex strip, the outer gear is installed in the middle-layer convex strip installation groove and is in toothed connection with the middle-layer tooth groove convex strip, and the operation rotary rod is rotated to adjust the inner-layer contact nut and the middle-layer contact nut to longitudinally move.
The effect of this scheme is: the telescopic nut group can be operated to stretch by operating the rotary rod, and the contact area between the telescopic nut group and the external thread connecting screw rod is adjusted so as to change the current intensity; simple structure, the operation is comparatively convenient, need not to carry out the structure and dismantle and can adjust, and before the operation is connected to the electricity and in the operation all can adjust.
Preferably, the inner gear and the outer gear are gears with half-cycle teeth only, and teeth on the inner gear and the outer gear are in contact. The effect of this scheme is: the inner layer contact nut and the middle layer contact nut in the telescopic nut group can be telescopic, the two connected half-tooth gears can operate the inner layer contact nut to extend to the maximum height before the middle layer contact nut extends, and the extension continuity of the inner layer contact nut and the middle layer contact nut can be ensured.
As an optimal scheme, the bottom outer walls of the inner layer tooth slot raised strips and the middle layer tooth slot raised strips are respectively provided with a limiting buckle hole, the top parts of the groove walls of the inner layer raised strip mounting groove and the middle layer raised strip mounting groove are respectively provided with a limiting buckle matched with the limiting buckle holes, the groove walls of the inner layer raised strip mounting groove and the middle layer raised strip mounting groove are also provided with a horizontally extending buckle switch, the limiting buckles are telescopic rods which extend in the horizontal direction and contain springs, the telescopic states of the limiting buckles can be triggered to be switched by pressing the buckle switches, the ends of the limiting buckles facing the limiting buckle holes are inclined tips, and the limiting buckles can be inserted into the limiting buckle holes when in an extending state;
the inner gear faces to the surface of the outer gear, a convex inner switch rod is arranged on the surface of the outer gear, which faces away from the inner gear, a convex outer switch rod is arranged on the surface of the outer gear, and the inner switch rod and the outer switch rod are used for pressing the buckle switch to switch the expansion state of the limit buckle.
The effect of this scheme is: two switch rods are arranged on the operation rotating rod, and when each gear is rotated to the end, the switch rods pass through the buckle switch, and the limit buckle is inserted into the limit buckle hole to be locked; when the gear rotates to be in contact with the tooth gap of the layer of the nut, the switch rod touches the buckle switch to enable the limit buckle to retract, and the layer of the nut can retract under the drive of the gear.
As a preferable scheme, the inner end of the operation rotating rod is inserted into the telescopic nut group, and the end part of the outer end is provided with an adjusting knob. The effect of this scheme is: the adjusting knob is convenient to rotate and saves more labor.
As a preferable scheme, the outer wall of the outer layer contact nut is provided with a clamping needle which extends outwards vertically and horizontally, the adjusting knob is of a hollow structure in the shape of a vehicle steering wheel, and the clamping needle can pass through the adjusting knob to limit the rotation of the adjusting knob after the operating rotating rod is pressed inwards. The effect of this scheme is: the clamping needle blocks the adjusting knob from rotating when the rotating rod is pressed inwards, so that the integral height is not changed, the clamping needle is invalid when the rotating rod is pulled outwards, and the contact area can be adjusted by rotating the adjusting knob at will.
The beneficial effects are that: the sleeve threaded electric connection device with the adjustable contact area is simple in structure, convenient to operate and capable of adjusting the contact area of threaded connection; the structure is not required to be disassembled; can be adjusted before and during operation; the three-layer contact nut of the telescopic nut component can be selected to have proper height according to actual conditions; the contact nut has the clamping function, ensures that the device cannot slide, and has certain stability.
Drawings
FIG. 1 is a simplified illustration of the structure of the present invention;
FIG. 2 is a simplified illustration of the structure of the set of retractable nuts of the present invention;
FIG. 3 is a schematic view of the invention illustrating the disassembly of the set of retractable nuts;
FIG. 4 is a schematic view of the inner layer contact nut 4 and operating lever 7 of the present invention;
fig. 5 is a simplified view of the structure of the operating lever 7 of the present invention;
FIG. 6 is a position indication of the limit clasp 12 of the present invention in a set of retractable nuts;
FIG. 7 shows a position indication of the snap switch 18 of the present invention in the set of retractable nuts;
fig. 8 is an explanatory diagram showing the cooperation of the limit catch 12 and the limit catch hole 13 according to the present invention.
Reference numerals meaning: 1. a current-carrying floor; 2. a connection terminal; 3. an external thread is connected with the screw rod; 4. an inner layer contacting the nut; 5. a middle layer contacting the nut; 6. an outer layer contacting the nut; 7. operating the rotary rod; 8. an adjustment knob; 9. inner layer tooth slot convex strip; 10. middle layer tooth slot convex strip; 11. a clamping needle; 12. limiting buckle; 13. limiting buckle holes; 14. an inner layer gear; 15. an outer gear; 16. an inner layer switch lever; 17. an outer layer switch lever; 18. and a buckle switch.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and examples:
examples: as shown in fig. 1-8, a sleeve threaded electric connection device with adjustable contact area comprises a current-carrying bottom plate 1 and a wiring terminal 2, wherein the current-carrying bottom plate 1 is connected with end plates of the wiring terminal 2 through an external threaded connection screw rod 3, and a telescopic nut group is sleeved on the connection screw rod 2 in a threaded manner;
the telescopic nut group comprises an inner layer contact nut 4, a middle layer contact nut 5 and an outer layer contact nut 6 which are overlapped and telescopic, the bottom of the outer layer contact nut 6 is fixedly connected with the wiring terminal 2, the outer diameter of the inner layer contact nut 4 is equal to the inner diameter of the middle layer contact nut 5, and the outer diameter of the middle layer contact nut 5 is equal to the inner diameter of the outer layer contact nut 6;
an inner layer tooth socket convex strip 9 is arranged on the outer wall of the inner layer contact nut 4, an inner layer convex strip mounting groove is arranged on the inner wall of the middle layer contact nut 5 corresponding to the inner layer tooth socket convex strip 9, a middle layer tooth socket convex strip 10 is arranged on the outer wall of the middle layer contact nut 5, and a middle layer convex strip mounting groove is arranged on the outer layer contact nut 6 corresponding to the middle layer tooth socket convex strip 10;
the same operation rotary rod 7 is horizontally and vertically penetrated on the outer walls of the middle-layer contact nut 5 and the outer-layer contact nut 6, an inner gear 14 is arranged on the operation rotary rod 7 corresponding to the inner-layer tooth groove convex strip 9, an outer gear 15 is arranged on the operation rotary rod 7 corresponding to the middle-layer tooth groove convex strip 10, the inner gear 14 is positioned in the inner-layer convex strip mounting groove and is in toothed connection with the inner-layer tooth groove convex strip 9, the outer gear 15 is installed in the middle-layer convex strip mounting groove and is in toothed connection with the middle-layer tooth groove convex strip 10, and the operation rotary rod 7 is rotated to adjust the inner-layer contact nut 4 and the middle-layer contact nut 5 to longitudinally move.
Further, the inner gear 14 and the outer gear 15 are gears having only half-circumference teeth, and teeth on the inner gear 14 and the outer gear 15 are engaged with each other.
Further, the bottom outer walls of the inner layer tooth slot convex strip 9 and the middle layer tooth slot convex strip 10 are respectively provided with a limit buckle hole 13, the top parts of the groove walls of the inner layer convex strip installation groove and the middle layer convex strip installation groove are respectively provided with a limit buckle 12 which is matched with the limit buckle holes 13, the groove walls of the inner layer convex strip installation groove and the middle layer convex strip installation groove are also provided with a buckle switch 18 which extends horizontally, the limit buckle 12 is a telescopic rod which extends horizontally and contains a spring, the telescopic state of the limit buckle 12 can be triggered to be switched by pressing the buckle switch 18, the end part of the limit buckle 12, which faces the limit buckle holes 13, is an inclined tip, and the limit buckle 12 can be inserted into the limit buckle holes 13 when in an extending state;
the inner gear 14 is provided with a raised inner switch lever 16 on a surface facing the outer gear 15, the outer gear 15 is provided with a raised outer switch lever 17 on a surface facing away from the inner gear 14, and the inner switch lever 16 and the outer switch lever 17 are used for pressing the buckle switch 18 to switch the telescopic state of the limit buckle 12, wherein the internal connection of the buckle switch and the buckle can adopt various modes and adopt the existing trigger switch mode, and the invention is not explicitly described.
Further, the inner end of the operation rotating rod 7 is inserted into the telescopic nut group, and the end part of the outer end is provided with an adjusting knob 8.
Further, a clamping needle 11 extending outwards vertically and horizontally is arranged on the outer wall of the outer layer contact nut 6, the adjusting knob 8 is of a hollow structure in the shape of a vehicle steering wheel, and the clamping needle 11 can penetrate through the adjusting knob 8 to limit rotation of the adjusting knob after the operating rotating rod 7 is pressed inwards.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. The utility model provides a sleeve pipe screw thread electricity connecting device of adjustable area of contact which characterized in that: the connecting device comprises a current-carrying bottom plate (1) and a connecting terminal (2), wherein end plates of the current-carrying bottom plate (1) and the connecting terminal (2) are connected through an external threaded connecting screw rod (3), and a telescopic nut group is sleeved on the connecting screw rod (2) in a threaded manner;
the telescopic nut group comprises an inner layer contact nut (4), a middle layer contact nut (5) and an outer layer contact nut (6) which are overlapped and telescopic, wherein the bottom of the outer layer contact nut (6) is fixedly connected with the wiring terminal (2), the outer diameter of the inner layer contact nut (4) is equal to the inner diameter of the middle layer contact nut (5), and the outer diameter of the middle layer contact nut (5) is equal to the inner diameter of the outer layer contact nut (6);
an inner layer tooth groove convex strip (9) is arranged on the outer wall of the inner layer contact nut (4), an inner layer convex strip mounting groove is arranged on the inner wall of the middle layer contact nut (5) corresponding to the inner layer tooth groove convex strip (9), a middle layer tooth groove convex strip (10) is arranged on the outer wall of the middle layer contact nut (5), and a middle layer convex strip mounting groove is arranged on the outer layer contact nut (6) corresponding to the middle layer tooth groove convex strip (10);
the outer walls of the middle layer contact nut (5) and the outer layer contact nut (6) are horizontally and vertically penetrated with the same operation rotary rod (7), the operation rotary rod (7) is provided with an inner layer gear (14) corresponding to an inner layer tooth groove convex strip (9), the operation rotary rod (7) is provided with an outer layer gear (15) corresponding to an middle layer tooth groove convex strip (10), the inner layer gear (14) is positioned in the inner layer convex strip mounting groove and is in toothed connection with the inner layer tooth groove convex strip (9), the outer layer gear (15) is installed in the middle layer convex strip mounting groove and is in toothed connection with the middle layer tooth groove convex strip (10), and the operation rotary rod (7) is rotated to adjust the inner layer contact nut (4) and the middle layer contact nut (5) to longitudinally move;
the device is characterized in that limit buckle holes (13) are formed in the outer walls of the bottoms of the inner layer tooth groove convex strips (9) and the middle layer tooth groove convex strips (10), limit buckles (12) which are matched with the limit buckle holes (13) are formed in the tops of the groove walls of the inner layer tooth groove convex strips and the middle layer tooth groove convex strips, a horizontally extending buckle switch (18) is further arranged on the groove walls of the inner layer tooth groove convex strips and the middle layer tooth groove convex strips, the limit buckles (12) extend in the horizontal direction and are provided with telescopic rods of springs, the telescopic state of the limit buckles (12) can be triggered to be switched by pressing the buckle switch (18), the end parts, facing the limit buckle holes (13), of the limit buckles (12) are inclined sharp ends, and the limit buckles (12) can be inserted into the limit buckle holes (13) when in an extending state;
the inner gear (14) is provided with a raised inner switch rod (16) on the surface facing the outer gear (15), the outer gear (15) is provided with a raised outer switch rod (17) on the surface facing away from the inner gear (14), and the inner switch rod (16) and the outer switch rod (17) are used for pressing the buckle switch (18) to switch the expansion state of the limit buckle (12).
2. The adjustable contact area electrical threaded connection of claim 1, wherein: the inner gear (14) and the outer gear (15) are gears with half-cycle teeth only, and teeth on the inner gear (14) and the outer gear (15) are connected.
3. The adjustable contact area electrical threaded connection of claim 1, wherein: the inner end of the operation rotating rod (7) is inserted into the telescopic nut group, and the end part of the outer end is provided with an adjusting knob (8).
4. A contact area adjustable box threaded electrical connection as defined in claim 3, wherein: the outer wall of the outer layer contact nut (6) is provided with a clamping needle (11) extending outwards in a vertical and horizontal mode, the adjusting knob (8) is of a hollow structure in a disc shape in the direction of an automobile, and the clamping needle (11) can penetrate through the adjusting knob (8) to limit rotation of the adjusting knob after the operating rotating rod (7) is pressed inwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110972416.XA CN113612066B (en) | 2021-08-24 | 2021-08-24 | Sleeve thread electric connection device with adjustable contact area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110972416.XA CN113612066B (en) | 2021-08-24 | 2021-08-24 | Sleeve thread electric connection device with adjustable contact area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113612066A CN113612066A (en) | 2021-11-05 |
| CN113612066B true CN113612066B (en) | 2023-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110972416.XA Active CN113612066B (en) | 2021-08-24 | 2021-08-24 | Sleeve thread electric connection device with adjustable contact area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113612066B (en) |
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2021
- 2021-08-24 CN CN202110972416.XA patent/CN113612066B/en active Active
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| CN113612066A (en) | 2021-11-05 |
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