CN111987488A - Connecting device and method for self healing of power equipment connector - Google Patents
Connecting device and method for self healing of power equipment connector Download PDFInfo
- Publication number
- CN111987488A CN111987488A CN201910432466.1A CN201910432466A CN111987488A CN 111987488 A CN111987488 A CN 111987488A CN 201910432466 A CN201910432466 A CN 201910432466A CN 111987488 A CN111987488 A CN 111987488A
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- China
- Prior art keywords
- low
- temperature metal
- nut
- conductor
- connected conductor
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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
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/304—Clamped connections, spring connections utilising a screw or nut clamping member having means for improving contact
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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
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/01—Connections using shape memory materials, e.g. shape memory metal
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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
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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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
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
- H01R43/027—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for connecting conductors by clips
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
Abstract
The invention discloses a connecting device and a method for self healing of a power equipment joint. According to the invention, the low-temperature metal and the memory alloy intelligent gasket are matched for use in the middle of the connected conductor, when the current is increased, the connected conductor joint generates heat, the memory alloy intelligent gasket can automatically output pressure through single-phase change when the temperature is increased, the melted low-temperature metal is extruded and diffused to the gap of the connected conductor contact to increase the contact surface of the joint, the gap is filled with the low-temperature metal, air cannot permeate into the contact, an oxide film cannot be formed on the surface of the connected conductor metal, the contact surface is increased, the current is uniformly distributed, and therefore, the resistance is reduced, and the purpose of self-healing cooling of a heating point is achieved. The low-temperature metal replaces the traditional conductive adhesive to increase the conductive efficiency of the equipment joint.
Description
Technical Field
The invention relates to the technical field of power installation, in particular to a self-healing connecting device and method for a power equipment connector.
Background
The electrical equipment joint is generally connected by bolts commonly, when the joint is overheated due to winter and summer climate change or too high current density, expansion can be caused, the expansion coefficient of copper and aluminum is larger than that of steel, when the temperature is reduced due to bus current reduction and the like, the bus joint can not expand freely, when the temperature is reduced due to bus current reduction and the like, the contraction of the bus is larger than that of the bolts, so that the pressure is reduced, a gap is formed, at the moment, the position of a contact surface is staggered, the contact pressure is reduced, and the contact resistance is increased. The temperature rise causes the bus contact surface to be oxidized, the direct contact of the original joint metal surface is damaged, the formation of an oxide film is avoided, and the contact resistance is larger. The contact resistance is increased by each temperature change cycle, the heat is increased by the next cycle, the contact is further deteriorated by the higher temperature, the metal can creep under the traditional metal pressure when the existing power joint is installed, the pressure of the contact is reduced along with the time, the creep is also reduced until the pressure is reduced to be not deformed, the pressure relaxation rate is closely related to the operation temperature, the creep size depends on the temperature to a greater extent, the temperature change is the reason of gradual deterioration of the joint of the electrical equipment, the interaction of the thermal motion stress and the creep can form a vicious cycle, the bolt connecting part can generate heat finally, the joint can be burned out finally when the temperature is serious, the safe operation of the equipment is influenced, and in addition, a layer of oxidation film is generally generated in the air by the metal. If the oxide film is not removed, the contact resistance is still high. Even if the oxide film is cleaned, if the oxide film is not isolated from air, a new oxide film is immediately generated. It is known that strict regulations and requirements are required for the treatment of the contact surface of the joint of the electrical equipment because air and moisture are seriously permeated into the joint after the oxide film is cracked, thereby corroding the joint and accelerating the oxidation to increase the electrical resistance. Currently, there is no effective connection method to solve the above problems. Therefore, a connecting device and a method for self-healing of a joint of power equipment are developed.
Disclosure of Invention
In view of the above, the present invention provides a self-healing connection device and method for electrical equipment joints, which can solve the above problems in the prior art
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a connecting device and a method for self healing of a power equipment joint, which comprises a screw, an upper nut and a lower nut, a connected conductor, a memory alloy intelligent gasket and low-temperature metal, wherein the connected conductor is divided into two parts and is fixedly connected through the upper nut and the lower nut respectively, the memory alloy intelligent gasket is arranged between the upper part of the upper nut and the upper part of the connected conductor, a flat pad is arranged between the lower part of the upper nut and the lower part of the connected conductor, and the low-temperature metal is arranged between the connected conductors.
Preferably, the connection method comprises three steps, namely, preparing a low-temperature metal with proper thickness to be placed between two connected conductors.
And step two, penetrating the screw rod through the connected conductor, sleeving the memory alloy intelligent gasket on the upper part, and sleeving the flat gasket on the lower part.
And step three, rotationally matching the upper nut and the lower nut until the upper nut and the lower nut are free of clearance.
The invention has the beneficial effects that: through the cooperation of adopting low temperature metal and memory alloy intelligence gasket in the middle of by connecting conductor, it generates heat by connecting conductor joint to increase as the electric current, memory alloy intelligence gasket meets temperature rise can single-phase transition automatic output pressure, the low temperature metal extrusion after will melting spreads to and is increased the joint contact surface by connecting conductor contact gap department, because the gap is filled by low temperature metal, the air can not permeate in the contact, can not form the oxide film by connecting conductor metal surface, the contact surface has been increased, let the current distribution even, thereby reduce resistance, reach the purpose of the self-healing cooling of the point of generating heat. The low-temperature metal replaces the traditional conductive adhesive to increase the conductive efficiency of the equipment joint.
The invention relates to a connecting device and a method for self healing of a power equipment joint, which comprises a screw, an upper nut and a lower nut, a connected conductor, a memory alloy intelligent gasket and low-temperature metal, wherein the connected conductor is divided into two parts and is fixedly connected through the upper nut and the lower nut respectively, the memory alloy intelligent gasket is arranged between the upper part of the upper nut and the upper part of the connected conductor, a flat pad is arranged between the lower part of the upper nut and the lower part of the connected conductor, and the low-temperature metal is arranged between the connected conductors.
Further, the connecting method comprises three steps, namely, preparing low-temperature metal with proper thickness to be placed between two connected conductors.
And step two, penetrating the screw rod through the connected conductor, sleeving the memory alloy intelligent gasket on the upper part, and sleeving the flat gasket on the lower part.
And step three, rotationally matching the upper nut and the lower nut until the upper nut and the lower nut are free of clearance. By combining the structure with the design scheme, the invention can fully solve the problems that when the power connector is installed, metal can creep under the traditional metal pressure, the pressure of the contact head can be reduced along with the time, the creep is also reduced, until the pressure is reduced to no longer deform, the pressure is relaxed and is oxidized by gaps at the connecting point, finally, the bolt connecting part generates heat, and the connector is burned out finally in serious cases to influence the safe operation of equipment. Put through low temperature metal and fill in by the connecting conductor centre, it generates heat by the connecting conductor joint to increase as the electric current, memory alloy intelligence gasket meets temperature rise can single-phase transition automatic output pressure, low temperature metal extrusion after will melting spreads to by the increasing contact surface of connecting conductor contact gap department, because the gap is filled by low temperature metal, the air can not infiltrate in the contact, can not form the oxide film by the connecting conductor metal surface, the contact surface has been increased, let the current distribution even, thereby reduce resistance, reach the purpose of the some self-healing cooling that generates heat. The low-temperature metal replaces the traditional conductive adhesive to increase the conductive efficiency of the equipment joint.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. the device comprises a screw, 2 parts of an upper nut and a lower nut, 3 parts of a connected conductor, 4 parts of a memory alloy intelligent gasket, 5 parts of a flat gasket and 6 parts of low-temperature metal.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1, the connecting device and method for self-healing of the power equipment joint comprises a screw rod 1, an upper nut 2, a lower nut 2, a connected conductor 3, a memory alloy intelligent gasket 4 and low-temperature metal 6, wherein the connected conductor 3 is divided into two parts and is fixedly connected with the two parts through the upper nut 2 and the lower nut 2 respectively, the memory alloy intelligent gasket 4 is arranged between the upper part of the upper nut 2 and the upper part of the connected conductor 3, a flat pad 5 is arranged between the lower part of the upper nut 2 and the lower part of the connected conductor 3, and the low-temperature metal 6 is arranged between the connected conductors 3.
According to the self-healing connecting device and method for the power equipment connector, the low-temperature metal 6 is placed in the middle of the connected conductor 3 for filling, when the current is increased, the connected conductor 3 connector generates heat, the memory alloy intelligent gasket 4 can automatically output pressure through single-phase change when the temperature rises, the melted low-temperature metal 6 is extruded and diffused to the gap of the contact of the connected conductor 3, the contact surface of the connector is increased, air cannot permeate into the contact due to the fact that the gap is filled with the low-temperature metal 6, an oxidation film cannot be formed on the surface of the metal of the connected conductor 3, the contact surface is increased, current is uniformly distributed, and therefore resistance is reduced, and the purpose of self-healing cooling of a heating point is achieved. The low-temperature metal 6 replaces the traditional conductive adhesive to increase the conductive efficiency of the equipment joint.
Wherein the connecting method comprises three steps, namely, preparing a low-temperature metal 6 with proper thickness to be placed between two connected conductors 3.
And step two, the screw 1 penetrates through the connected conductor 3, the memory alloy intelligent gasket 4 is sleeved on the upper part, and the flat gasket 5 is sleeved on the lower part.
And step three, the upper nut and the lower nut are matched and screwed until no gap exists.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (2)
1. Connecting device and method that power equipment connects self-healing, including screw rod (1), upper and lower nut (2), by connecting conductor (3), memory alloy intelligence gasket (4) and low temperature metal (6), its characterized in that: the connecting conductor (3) is divided into two parts, the two parts are fixedly connected through an upper nut and a lower nut (2), a memory alloy intelligent gasket (4) is arranged between the upper part of the upper nut and the upper part of the connected conductor (3), a flat gasket (5) is arranged between the lower part of the upper nut and the lower part of the lower nut (2) and the lower part of the connected conductor (3), and low-temperature metal (6) is arranged between the connected conductor (3).
2. The self-healing connection device and method for electrical equipment connectors according to claim 1, wherein: the connection method comprises three steps:
step one, preparing a low-temperature metal (6) with a proper thickness to be placed between two connected conductors (3)
Step two, the screw (1) penetrates through the connected conductor (3), a memory alloy intelligent gasket (4) is sleeved on the upper part, and a flat gasket (5) is sleeved on the lower part;
and step three, screwing the upper and lower nuts (2) until no gap exists.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910432466.1A CN111987488A (en) | 2019-05-23 | 2019-05-23 | Connecting device and method for self healing of power equipment connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910432466.1A CN111987488A (en) | 2019-05-23 | 2019-05-23 | Connecting device and method for self healing of power equipment connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111987488A true CN111987488A (en) | 2020-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910432466.1A Pending CN111987488A (en) | 2019-05-23 | 2019-05-23 | Connecting device and method for self healing of power equipment connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111987488A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2468160Y (en) * | 2001-02-22 | 2001-12-26 | 任义 | Contact and clamping member for not-overheating electric appliance |
| CN1714478A (en) * | 2002-11-20 | 2005-12-28 | A.M.C.有限公司 | Contact device for improving lifetime of electrical connections |
| WO2008033917A2 (en) * | 2006-09-12 | 2008-03-20 | Roche Richard M | Thermochromic washer for monitoring performance or integrity of electrical connections |
| CN103066475A (en) * | 2013-01-07 | 2013-04-24 | 郭瑞 | Method for reducing contact resistance based on low-melting-point metal and oxide thereof |
| CN104992742A (en) * | 2015-07-08 | 2015-10-21 | 北京依米康科技发展有限公司 | High-viscosity and low-melting-point metal conductive paste and preparation method and application thereof |
| CN106594048A (en) * | 2016-11-08 | 2017-04-26 | 国家电网公司 | Bolt assembly of shape memory alloy cable clamp |
| CN206682131U (en) * | 2016-12-30 | 2017-11-28 | 苏州国嘉记忆合金有限公司 | A kind of auxiliary connection of the locking nut with memorial alloy ring |
| CN210957032U (en) * | 2019-05-23 | 2020-07-07 | 广州华嘉电力科技有限公司 | Connecting device for self healing of power equipment connector |
-
2019
- 2019-05-23 CN CN201910432466.1A patent/CN111987488A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2468160Y (en) * | 2001-02-22 | 2001-12-26 | 任义 | Contact and clamping member for not-overheating electric appliance |
| CN1714478A (en) * | 2002-11-20 | 2005-12-28 | A.M.C.有限公司 | Contact device for improving lifetime of electrical connections |
| WO2008033917A2 (en) * | 2006-09-12 | 2008-03-20 | Roche Richard M | Thermochromic washer for monitoring performance or integrity of electrical connections |
| CN103066475A (en) * | 2013-01-07 | 2013-04-24 | 郭瑞 | Method for reducing contact resistance based on low-melting-point metal and oxide thereof |
| CN104992742A (en) * | 2015-07-08 | 2015-10-21 | 北京依米康科技发展有限公司 | High-viscosity and low-melting-point metal conductive paste and preparation method and application thereof |
| CN106594048A (en) * | 2016-11-08 | 2017-04-26 | 国家电网公司 | Bolt assembly of shape memory alloy cable clamp |
| CN206682131U (en) * | 2016-12-30 | 2017-11-28 | 苏州国嘉记忆合金有限公司 | A kind of auxiliary connection of the locking nut with memorial alloy ring |
| CN210957032U (en) * | 2019-05-23 | 2020-07-07 | 广州华嘉电力科技有限公司 | Connecting device for self healing of power equipment connector |
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Application publication date: 20201124 |