CN218919305U

CN218919305U - High-voltage-resistant multi-core power connector

Info

Publication number: CN218919305U
Application number: CN202222889342.6U
Authority: CN
Inventors: 余觉; 唐宝富; 何国兵; 顾叶青; 万继伟
Original assignee: CETC 14 Research Institute
Current assignee: CETC 14 Research Institute
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-04-25
Anticipated expiration: 2032-10-31

Abstract

The utility model provides a high-voltage-resistant multi-core power connector which comprises a shell, an insulator, conductors and a high-voltage cable corresponding to the conductors, wherein the insulator is fixedly arranged in the shell, a plurality of conductors are uniformly fixed on the surface of the insulator, and the conductors are perpendicular to the surface of the insulator; the conductors pass through the insulators and are correspondingly connected with the high-voltage cables one by one; a plurality of axial step through holes are uniformly arranged in the insulator, and each conductor passes through the corresponding step through hole and is fixedly arranged in the insulator; the front end of the axial step through hole of the insulator is provided with a circular step sinking groove, and the circular outer edge of the front end surface of the insulator is provided with an outer edge sinking groove. The utility model adopts the multi-core conductor integration design, and the integration level of the electrical system is improved by integral plug-in; through the optimization design of the sealing and protecting process, the conductor surface coating process and the insulator end face structure, the voltage resistance and the insulation and protection performance of the connector are improved, and the use safety of the multi-core connector in an outdoor environment is enhanced.

Description

High-voltage-resistant multi-core power connector

Technical Field

The utility model relates to the field of electricity, in particular to a high-voltage-resistant multi-core power connector.

Background

The high-voltage multi-core power connector has the advantages of high current, high integration, modularization, compact structure and the like, and is widely applied to large-scale mechanical automation equipment by realizing on-off of a plurality of power links simultaneously through integral plugging. The multi-core power connector is limited by the structural volume, the conductor spacing of the multi-core power connector is narrow, the voltage withstand capability is limited, and the multi-core power connector has a large insulation risk when communicating high-voltage and large current under outdoor severe working conditions. Through the optimization to connector structure and technology processing mode, when guaranteeing multicore structure high integration advantage, improve the withstand voltage and the insulating protection performance of power connector, it is significant to strengthen the outdoor safety in utilization of connector.

Disclosure of Invention

The utility model aims to solve the problems and provides a high-voltage-resistant multi-core power connector which comprises a shell, an insulator, conductors and a high-voltage cable corresponding to the conductors, wherein the insulator is fixedly arranged in the shell, a plurality of conductors are uniformly fixed on the surface of the insulator, and the conductors are perpendicular to the surface of the insulator; the conductors pass through the insulators and are correspondingly connected with the high-voltage cables one by one; a plurality of axial step through holes are uniformly arranged in the insulator, and each conductor passes through the corresponding step through hole and is fixedly arranged in the insulator; the front end of the axial step through hole of the insulator is provided with a circular step sinking groove, and the circular outer edge of the front end surface of the insulator is provided with an outer edge sinking groove.

Further, three layers of colloids are sequentially arranged in the shell along the axial direction of the circular cavity, and the three layers of colloids are positioned at the tail end of the insulator and are attached to the circular end face of the tail end of the insulator; the front and rear ends of the three-layer colloid are structural adhesives, and the middle is silica gel; the electric conductor and the high-voltage cable are physically fixed through three layers of colloid.

Further, the three layers of colloid are contacted with the insulator to form a first layer of structural colloid, and the other two layers of colloid are sequentially formed by a second layer of sealing silica gel and a third layer of structural colloid; the glue surface of the first layer of structural glue is over the tail end of the conductor and forms a height difference with the crimping end surface of the high-voltage cable; the second layer of sealing silica gel is used for filling gaps between the first layer of structural gel and the connector shell; and the third layer of structural adhesive is used for shaping and fixing the high-voltage cable at the root of the conductor.

Further, a lock nut is arranged between the shell and the insulator and at the rear end of the insulator, and the lock nut presses the rear end of the insulator to fix the insulator in the inner cavity of the shell.

Further, the front end of the conductor protrudes out of the surface of the insulator to form a contact pin, the conductive connection of the circuit is realized through the insertion of the connector, and the tail end of the conductor is connected with the high-voltage cable in a crimping manner to realize the transmission of high-voltage current.

Further, the surface of each conductor below the non-plug-in connection section is coated with insulating paint, and the height of the insulating paint exceeds the front end surface of the insulator.

Further, the housing includes an outer flange and a circular shell secured through the outer flange; the circular shell provides a mounting foundation and structural protection for the insulator, and the outer flange provides a structural interface for the power connector to mount and fix externally.

Further, two guide grooves are formed in the inner side of the circular shell and are symmetrical with respect to the central axis of the circular shell, and the power connector is circumferentially positioned and guided in the plugging process.

Further, a plurality of floating sleeves are uniformly arranged on the outer flange, so that the power connector still has radial floating capacity after being fixedly installed.

Compared with the prior art, the utility model has the following advantages:

1. the tail end of the power connector is sequentially sealed with the structural adhesive and the sealant in three layers, so that physical fixation of the conductor and the cable is realized, channels for outside water vapor to permeate into the connector are blocked, and the voltage resistance and insulation protection performance of the power connector are improved.

2. The insulator end face structure is optimally designed, and the ladder sink grooves are respectively formed in the root of the conductor at the front end of the insulator and the outer edge of the end face, so that the creepage distance between the adjacent conductor and the connector shell is increased, and the voltage resistance and the insulation resistance of the multi-core power connector are improved.

3. The insulating paint coating design is implemented on the lower surface of the non-insertion connecting section of the conductor, so that the creepage distance between adjacent conductors is further prolonged, and the insulating performance of the multi-core power connector is improved.

4. The guide groove is arranged on the inner side of the power connector shell, so that the circumferential positioning precision of the multi-core conductor in the process of insertion and butt joint is ensured; the outer flange is uniformly provided with the floating sleeves, so that the power connector still has certain radial floating capacity after being fixedly installed, and the butt joint tolerance of the multi-core connector is improved.

Drawings

Fig. 1 is a schematic external view of a power connector according to a first embodiment.

Fig. 2 is a front view of a power connector according to the first embodiment.

Fig. 3 is a side cross-sectional view of a power connector according to a first embodiment.

Fig. 4 is a schematic diagram illustrating a creepage distance of a power connector according to a first embodiment.

Fig. 5 is an alternate damp heat test schematic diagram of a power connector according to the first embodiment.

The reference numerals in the figures represent the meanings:

the wet heat testing device comprises a shell 1, a circular shell 1-1, an outer flange 1-2, a guide groove 1-3, a floating sleeve 1-4, an insulator 2, a circular stepped sink 2-1, an outer edge sink 2-2, a conductor 3, insulating paint 3-1, a high-voltage cable 4, a locking nut 5, a first layer of structural adhesive 6, a second layer of sealing silica gel 7, a third layer of structural adhesive 8, a conventional 16-core power connector 9 and a wet heat testing box 10.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

Aspects of the utility model are described in this disclosure with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. The embodiments of the present disclosure are not necessarily intended to include all aspects of the utility model. It should be appreciated that the various concepts and embodiments described above, as well as those described in more detail below, may be implemented in any of a number of ways, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the disclosure may be used alone or in any suitable combination with other aspects of the disclosure.

Example 1

Referring to fig. 1, the power connector of the present embodiment includes a housing 1, an insulator 2, a conductor 3, and a high-voltage cable 4 corresponding to the conductor 3. The insulator 2 is fixedly arranged in the shell 1, 16 conductors 3 are uniformly fixed on the surface of the insulator 2, and the conductors 3 are perpendicular to the surface of the insulator 2; the conductors 3 are connected with the high-voltage cables 4 in a one-to-one correspondence through the insulators 2, so that the connection with the power supply equipment at the rear end is realized. With the integral plugging of the power connector, the connection and interruption of 16 power links are realized at the same time, and the integration level of the electrical system is improved.

Referring to fig. 1 and 2, the housing 1 is a physical foundation for assembling the multi-core power connector structure, and comprises an outer flange 1-2 and a circular housing 1-1 fixed through the outer flange, wherein the inner part provides a mounting foundation and a structural protection for an insulator, and the outer part provides a structural interface for mounting and fixing the power connector. The circular housing 1-1 provides a mounting base and structural protection for the insulator 2, and the outer flange 1-2 provides a structural interface for the connector to mount externally. The inside of the circular housing 1-1 is provided with two guide grooves 1-3 which are symmetrical about the central axis of the circular housing 1-1 and which function to provide circumferential positioning and guiding for the plugging process of the 16-core power connector. The outer flange 1-2 is uniformly provided with 4 floating sleeves 1-4, so that the power connector still has certain radial floating capacity after being fixedly installed, and the mating tolerance of the 16-core connector is improved.

With reference to fig. 2 and 3, the insulator 2 is in the shape of a circular cake, and is positioned circumferentially and radially with respect to the connector housing 1 by a front end step and an outer circle, respectively. And a lock nut 5 is arranged between the shell 1 and the insulator 2 and at the rear end of the insulator, so that the lock nut 5 tightly presses the rear end of the insulator 2, and the insulator is firmly arranged in the inner cavity of the shell 1. The insulating material is polyphenylene sulfide, and has good insulation, high temperature resistance and cutting processability. 16 axial step through holes are uniformly distributed in the insulator 2 in 3 circles, and the conductor 3 passes through the step through holes and is fixedly arranged in the insulator 2. The front end of the conductor 3 protrudes out of the surface of the insulator 2 to form a contact pin, the conductive connection of a circuit is realized through the insertion and the combination of a connector, and the tail end is connected with the high-voltage cable 4 in a crimping manner to realize the transmission of high-voltage current.

Referring to fig. 3, three layers of colloid are sequentially arranged in the shell 1 along the axial direction of the circular cavity, and the three layers of colloid are positioned at the tail end of the insulator 2 and are attached to the circular end face of the tail end of the insulator 2; the materials at two ends of the three-layer colloid are structural adhesives, and the middle is silica gel. The physical fixation of the conductor 3 and the high-voltage cable 4 is realized through three layers of sealing glue, and the insulation protection performance of the power connector is improved.

The three layers of colloid are contacted with the insulator 3 and are a first layer of structural colloid 6, and the other two layers of colloid are a second layer of sealing silica gel 7 and a third layer of structural colloid 8 in sequence; firstly, the first layer of structural adhesive 6 is required to be used for covering the tail end of the conductor 3 and forming a certain height difference with the crimping end face of the high-voltage cable 4, so that the conductor 3 is stably and firmly rooted on the insulator 2, and axial supporting force is provided for the conductor 3 in the connector plugging process. After the first layer of structural adhesive 6 is solidified, a second layer of sealing silica gel 7 is uniformly poured, and the purpose of the second layer of sealing silica gel is to fill gaps between the first layer of structural adhesive 6 and the connector shell 1 by utilizing the ductility and the viscosity of the sealing silica gel, so that external water vapor is blocked from penetrating into channels inside the connector, and the voltage resistance and the insulation protection performance of the power connector are improved. And finally, the third layer of structural adhesive 8 is poured into the tail end of the connector again, so that the high-voltage cable 4 at the root of the conductor is fixed in a shaping manner, and the problem that the sealing adhesive layer is damaged by continuous twisting of the high-voltage cable 4 at the tail end of the connector in the transportation and installation process of the power connector, and the insulation performance of the connector is affected is avoided.

With reference to fig. 3 and 4, the front end of the axial step through hole of the insulator 2 is provided with a circular step sinking groove 2-1, and the circular step sinking groove 2-1 increases the creepage distance between adjacent conductors and improves the insulativity of the connector. In the same way, the outer edge of the front end face of the insulator 2 is provided with the outer edge sinking groove 2-2, so that the creepage distance and insulation resistance of the conductor 3 of the power connector to the connector shell 1 and to the ground are improved.

Referring to fig. 3 and 4, the surface of each conductor 3 below the non-insertion connection section is coated with an insulating varnish 3-1, and the height of the insulating varnish 3-1 exceeds the front end surface of the insulator 2. Through insulator sinking groove design and conductor insulating paint coating treatment, the creepage distance between adjacent conductors is increased from a to b, the creepage distance between the conductors and the shell/ground is increased from c to d, and the insulating performance is obviously improved.

Referring to fig. 5, a schematic diagram of an alternating damp heat test of the power connector is shown, the high voltage resistant 16-core power connector in the embodiment and the conventional 16-core power connector 9 are simultaneously placed in the damp heat test box 10, and voltage resistance and insulation performance of the two connectors in an alternating damp heat environment are compared. Alternating damp-heat environmental conditions reference GJB150.9A-2009 "military equipment laboratory environmental test method part 9: the damp-heat test specifies that the total time of the test passes through 10 cycles of damp-heat circulation, each cycle is 24 hours, the temperature change is controlled to be 30-60 ℃, and the relative humidity is controlled to be 95%. The conventional 16-core power connector 9 has only one layer of structural adhesive poured into the tail end of the housing to fix the conductors, but the insulators and conductors are not subjected to any other treatment. The odd and even cores of each power connector are respectively connected in parallel and led out of the damp-heat test box 10, insulation resistance between the odd and even cores is tested outside the box, the test voltage is 1000V, and the test time point is 2 hours before each cycle is finished. The test results were as follows:

table: insulation resistance test value (unit: MΩ) of odd-even core of 16-core power connector assembly

The test shows that the power connector is subjected to tail end successive three-layer sealing glue, insulator sinking groove design and conductor surface coating treatment, so that the insulation voltage resistance performance is obviously improved.

Compared with the prior art, the utility model has the following advantages:

the utility model discloses a high-voltage-resistant multi-core power connector structure and a process implementation mode. Compared with the prior art, the method has the remarkable advantages that:

The foregoing description of the preferred embodiment of the utility model is not intended to limit the utility model to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model.

Claims

1. The high-voltage-resistant multi-core power connector comprises a shell (1), an insulator (2), conductors (3) and a high-voltage cable (4) corresponding to the conductors (3), and is characterized in that the insulator (2) is fixedly arranged in the shell (1), a plurality of conductors (3) are uniformly fixed on the surface of the insulator (2), and the conductors (3) are perpendicular to the surface of the insulator (2); the conductors (3) penetrate through the insulators (2) and are connected with the high-voltage cables (4) in a one-to-one correspondence manner; a plurality of axial step through holes are uniformly arranged in the insulator (2), and each conductor (3) passes through the corresponding step through hole and is fixedly arranged in the insulator (2); the front end of the axial step through hole of the insulator (2) is provided with a circular step sinking groove (2-1), and the circular outer edge of the front end surface of the insulator (2) is provided with an outer edge sinking groove (2-2).

2. The high-voltage-resistant multi-core power connector according to claim 1, wherein three layers of colloid are sequentially arranged in the shell (1) along the axial direction of the circular cavity, and the three layers of colloid are positioned at the tail end of the insulator (2) and are attached to the circular end face of the tail end of the insulator (2); the front and rear ends of the three-layer colloid are structural adhesives, and the middle is silica gel; the electric conductor (3) and the high-voltage cable (4) are physically fixed through three layers of colloid.

3. The high-voltage-resistant multi-core power connector according to claim 2, wherein the three layers of colloid are in contact with the insulator (2) and are a first layer of structural colloid (6), and the other two layers of colloid are a second layer of sealing silica gel (7) and a third layer of structural colloid (8) in sequence; the glue surface of the first layer of structural glue (6) is over the tail end of the conductor (3) and forms a height difference with the crimping end surface of the high-voltage cable (4); a second layer of sealing silicone (7) for filling the gap between the first layer of structural adhesive (6) and the connector housing (1); and the third layer of structural adhesive (8) is used for shaping and fixing the high-voltage cable (4) at the root of the conductor (3).

4. The high voltage resistant multi-core power connector according to claim 1, wherein a lock nut (5) is arranged between the housing (1) and the insulator (2) and at the rear end of the insulator, and the lock nut (5) is used for pressing the rear end of the insulator (2) to fix the insulator to the inner cavity of the housing (1).

5. The high-voltage-resistant multi-core power connector according to claim 1, wherein pins are formed on the surface of the protruding insulator (2) at the front end of the conductor (3), the conducting connection of the circuit is realized through the plugging of the connector, and the tail end is connected with the high-voltage cable (4) in a crimping manner, so that the transmission of high-voltage current is realized.

6. The high voltage tolerant multi-core power connector according to claim 5, wherein the surface of each conductor (3) below the non-plugging connection section is coated with an insulating paint (3-1), and the height of the insulating paint (3-1) exceeds the front end surface of the insulator (2).

7. The high voltage tolerant multi-core power connector according to claim 1, wherein the housing (1) comprises an outer flange (1-2) and a circular housing (1-1) secured through the outer flange; the circular shell (1-1) provides a mounting foundation and structural protection for the insulator (2), and the outer flange (1-2) provides a structural interface for external mounting and fixing for the power connector.

8. The high voltage tolerant multi-core power connector according to claim 7, characterized in that the inside of the circular housing (1-1) is provided with two guiding grooves (1-3), said two guiding grooves (1-3) being symmetrical about the central axis of the circular housing (1-1), the plugging process of the power connector providing circumferential positioning and guiding.

9. The high voltage tolerant multi-core power connector of claim 8 wherein the outer flange (1-2) is uniformly provided with a plurality of floating sleeves (1-4) to provide radial floating capability after the power connector is fixedly installed.