An all-insulated cable connector

Abstract

The application discloses a kind of full insulation cable connectors, including connecting plug and the cabinet fixed component at the one end of connecting plug, the connecting plug is F-shaped connecting plug, the F-shaped connecting plug is fixed on the partition by fixed component, the F-shaped connecting plug is connected with electric rod by first connecting group, and F-shaped connecting plug is provided with the cavity of accommodating electric rod, the first connecting component includes with the conversion connecting nut of electric rod connection and the elastic conductive plug of setting in conversion connecting nut;The device ensures that the connection resistance meets the current conduction capacity and temperature rise requirements, and ensures that the contact resistance and contact pressure meet the temperature rise requirements, the scheme adapts to urban economy and residents' demand for electricity, promotes the comprehensive construction of intelligent power grid distribution system of the country, not only meets the full insulation voltage transformer cable connection power supply requirements of ring network cabinet, but also improves power supply reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of high-voltage cable connectors, especially a kind of full insulation cable connector, specifically relates to the full insulation cable connector applied on full insulation ring main unit. BACKGROUND

[0002] In the prior art, the 12kV full insulation ring main unit voltage transformer in power grid adopts ordinary T-shaped cable connector, due to the influence of the size of full insulation ring main unit body, PT burning insulation accidents often occur in power supply system due to the fact that return bending radius cannot meet the requirements of high-voltage cable return bending, which seriously affects the safety of power supply system and the reliability of power supply.

[0003] Therefore, how to provide a dedicated full insulation cable connector with good insulation strength, large return bending radius and high safety and reliability for full insulation ring main unit voltage transformer is a technical problem to be solved by those skilled in the art. SUMMARY

[0004] To solve the problem of the prior art, the present application provides a full insulation cable connector and its application technology in full insulation ring main unit, which solves the problem that the 12kV silicone rubber insulated cable return bending radius cannot meet the requirement of 4 times the cable diameter due to the influence of the size of full insulation ring main unit body when ordinary T-shaped cable connector is used to connect the full insulation ring main unit voltage transformer, which causes PT burning insulation accidents in 12kV power supply system, seriously affecting the safety of power supply system.

[0005] The full insulation cable connector of the present application is mainly applied to full insulation ring main unit voltage transformer, and has the advantages of good insulation strength, large return bending radius and high safety and reliability.

[0006] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0007] A full insulation cable connector, comprising a connection plug and a cabinet fixing assembly at one end of the connection plug, characterized in that: the connection plug is an F-shaped connection plug, the F-shaped connection plug is fixed on a partition plate through a fixing assembly, the F-shaped connection plug is connected with a conducting rod through a first connecting assembly, and the F-shaped connection plug is provided with a cavity for accommodating the conducting rod, the first connecting assembly comprises a conversion connecting nut connected with the conducting rod and an elastic conducting plug arranged in the conversion connecting nut.

[0008] Further, a threaded hole is arranged at the tail end of the conducting rod, and the outer thread of the conversion connecting nut is screwed and fixed with the threaded hole; an insulating sleeve is fixed on the outer side of the conducting rod, and the insulating sleeve is fixed on the partition plate through a pressing plate and a hook bolt.

[0009] Further, the connecting hole in the trumpet shape is formed in the inner cavity of the connecting nut, the conductive plug is provided with elastic contact fingers at the end, and the other end is provided with a cable crimping hole for inserting and pressing the end of the wire core, the connecting hole is in interference fit with the elastic contact fingers through the cross-shaped elastic contact finger slot at the end, and the fitting depth is limited by the positioning partition in the middle of the conductive plug.

[0010] Further, the F-shaped connecting plug is provided with an equipotential grounding layer, a silicone rubber insulation layer, a silicone rubber cable insulation layer and a wire core from outside to inside, and the equipotential grounding layer is provided outside the silicone rubber insulation layer by vulcanization and integrated with the cable equipotential grounding layer.

[0011] Further, the F-shaped connecting plug is provided with a first equipotential grounding lug on the outer circle, a protective spacer sleeve is arranged at the connection of the fixing assembly, and the fixing assembly includes a fixing plate, a hook bolt, a locking nut and a saddle-shaped support, the fixing plate is fixed on the partition plate by bolts, the hook bolt is hung on the fixing plate, and the other end of the hook bolt passes through the mounting hole of the saddle-shaped support and is locked by the locking nut.

[0012] Further, the other end of the wire core is connected with a fuse through a fuse connecting lug, and the fuse connecting lug and the fuse are connected through a threaded connecting column, and the other end of the fuse is provided with a fuse metal head.

[0013] Further, the fuse metal head is connected to the voltage transformer through an L-shaped connecting plug, and the fuse metal head can be connected to the contact spring through the cable connecting sleeve in pressure contact mode.

[0014] Further, the L-shaped connecting plug is fixed on the cable connecting sleeve through a anti-back-off assembly, the anti-back-off assembly includes an anti-back-off fixed support, a hook-shaped fixed bolt and a locking nut, and the voltage transformer is fixed on the cabinet bottom plate.

[0015] Further, the L-shaped connecting plug is provided with an equipotential grounding layer, a silicone rubber insulation layer and a silicone rubber cable insulation layer from outside to inside, and the equipotential grounding layer of the L-shaped connecting plug is provided outside the silicone rubber insulation layer by vulcanization and integrated with the cable equipotential grounding layer.

[0016] Further, the L-shaped connecting plug is provided with an equipotential grounding layer, a silicone rubber insulation layer and a silicone rubber cable insulation layer from outside to inside, and the equipotential grounding layer of the L-shaped connecting plug is provided outside the silicone rubber insulation layer by vulcanization and integrated with the cable equipotential grounding layer.

[0017] Compared with existing technologies, the fully insulated cable connector provided by this invention has a unique structure. The fully insulated cable connector proposed in this solution is designed to meet the electricity needs of urban economy and residents' daily life, and promote the comprehensive construction of intelligent power grid distribution system in the country. It not only meets the power supply requirements of the voltage transformer cable connection of the fully insulated ring network cabinet, but also improves the reliability of power supply.

[0018] The elastic contact fingers in this connection structure achieve an interference fit, ensuring that the connection resistance meets the requirements for current conduction and temperature rise. A cross-shaped groove is formed at the tip of the elastic contact finger, allowing it to elastically deform when inserted into the adapter nut, ensuring the required contact resistance, contact pressure, and temperature rise. The other end of the conductive plug has a cable crimping hole, and a positioning stop in the middle ensures the correct insertion depth of the elastic contact finger. The wire core is inserted into the cable crimping hole of the conductive plug, and after being crimped with cable crimping pliers, the F-shaped connector and the silicone rubber cable are vulcanized together. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Appendix Figure 1 This is a schematic diagram of the assembly structure of this fully insulated cable connector;

[0021] Appendix Figure 2 For the appendix Figure 1 Schematic diagram of the intermediate conversion connecting nut;

[0022] Appendix Figure 3 For the appendix Figure 1 A schematic diagram of the structure of the conductive plug;

[0023] Appendix Figure 4 This is a schematic diagram of the structure of this fully insulated cable connector arranged in a 12kV fully insulated ring main unit.

[0024] In the diagram, 1. F-shaped connector; 2. Partition; 3. Conductive rod; 10. Threaded hole; 4. Insulating sleeve; 16. Wire core; 18. Equipotential grounding layer; 14. Silicone rubber insulation layer; 15. Silicone rubber cable insulation layer; 9. First equipotential grounding lug; 13. Protective sleeve; 23. Fuse connector; 25. Fuse; 24. Threaded connector post; 26. Fuse metal head; 19. L-shaped connector; 29. ​​Voltage transformer; 27. Cable connecting sleeve; 28. Contact spring; 22. Equipotential shielding layer; 33. Second equipotential grounding lug.

[0025] Fixed assembly: 5, fixed plate; 6, hook bolt; 7, locking nut; 8, saddle support;

[0026] First connection group: 11, conversion connecting nut; 34, connecting hole; 12, conductive plug; 35, external thread; 37, elastic contact finger; 38, cable crimping hole; 36, cross-shaped elastic contact finger groove; 39, positioning partition;

[0027] Anti-backoff assembly: 30, anti-backoff fixed support; 31, hook-shaped fixed bolt; 32, locking nut; DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] As shown in Figure 1 , 2 , 3 and 4, a kind of full insulation cable connector, especially a kind of 12kV full insulation ring network cabinet voltage transformer special full insulation cable connector, is with ring network cabinet cable PC insulation sleeve 4, f type connection plug 1, silicone rubber insulated cable, L type connection plug 19, voltage transformer 29 and the like components composition. Mainly include connection plug and the cabinet fixed assembly located at the end of connection plug, the connection plug is F-shaped connection plug 1, the F-shaped connection plug 1 is fixed on the baffle 2 by fixed assembly, the F-shaped connection plug is connected with conductive rod 3 by first connecting assembly, and F-shaped connection plug 1 is provided with the cavity of accommodating conductive rod 3, the first connecting assembly includes conversion connecting nut 11 connected with conductive rod 3 and the elastic conductive plug 12 arranged in conversion connecting nut 11;The F-shaped connection plug is integrated with full insulation cable vulcanization, especially silicone rubber insulated cable.

[0030] As a preferred embodiment, the conductive rod 3 is a red copper conductive rod, and a M16 threaded hole 10 is arranged at the tail end of the conductive rod, and the conversion connecting nut 11 is fixedly installed through the M16 thread, the M16 external thread 35 of the conversion connecting nut 11 is screwed and fixed with the threaded hole 10, and the inner cavity of the conversion connecting nut 11 is a horn-shaped connecting hole 34, such as a connecting hole with horn-shaped edge with a diameter of 8MM, as shown in the attached Figure 2As shown in the figure, the main part is to match the elastic contact finger 37 of the specification 8.1mm conductive plug 12 in an embodiment, specifically, the elastic contact finger 37 is arranged at the end of the conductive plug 12, the other end is provided with a cable crimping hole 38 for the end of the wire core 16 to pass through and be pressed tightly, the connecting hole 34 is matched with the elastic contact finger 37 through the cross-shaped elastic contact finger groove 36 at the end of the elastic contact finger 37 and the matching depth is limited by the positioning partition 39 arranged in the middle of the conductive plug 12, which ensures that the connection resistance meets the current conduction capacity and temperature rise requirements, the wire core 16 passes through the cable crimping hole 38 of the conductive plug 12, and after being pressed tightly by the cable crimping pliers, the f-shaped connecting plug 1 is vulcanized with the silicone rubber cable to be integrated. The conductive plug 12 is arranged inside the F-shaped connecting plug 1, the cross-shaped elastic contact finger groove 36 can make the elastic contact finger 37 elastically deform when it is inserted into the conversion connecting nut 11, which ensures the contact resistance, contact pressure and temperature rise requirements. The insulating sleeve 4 is fixed outside the conductive rod 3, and the insulating sleeve 4 is fixed on the partition plate 2 through the pressing plate and the hook bolt. In this embodiment, the insulating sleeve 4 is preferably a PC insulating sleeve.

[0031] In an embodiment, regarding the F-shaped connecting plug 1, the F-shaped connecting plug 1 is preferably arranged from outside to inside with an equipotential grounding layer 18, a silicone rubber insulating layer 14, a silicone rubber cable insulating layer 15, and a wire core 16. The equipotential grounding layer 18 is arranged outside the silicone rubber insulating layer 14 by vulcanization and integrated with the cable equipotential grounding layer 17, which ensures the reliability of the equipotential grounding. Moreover, the F-shaped connecting plug 1 is provided with a first equipotential grounding lug 9 on the outer circle, which is connected with the grounding body of the ring main unit through the grounding wire to make the F-shaped connecting plug 1 reliably grounded, which meets the requirement that the F-shaped connecting plug 1, the equipotential grounding layer 18 and the silicone rubber cable equipotential grounding layer are at the same ground potential as the ground, and meets the touchable requirement. The fixed assembly connection is provided with a protective sleeve 13, which is a nylon O-shaped protective sleeve. The outer sleeve of the protective sleeve 13 is an aluminum saddle-shaped support 8. The nylon O-shaped protective sleeve 13 effectively protects the aluminum saddle-shaped support 8 from damaging the equipotential grounding layer of the F-shaped connecting plug 1 when the locking nut 7 is tightened, which ensures the insulation strength and grounding continuity of the F-shaped connecting plug 1. The fixed assembly includes a fixed plate 5, a hook bolt 6, a locking nut 7 and a saddle-shaped support 8. The fixed plate 5 is fixed on the partition plate 2 through the bolt, the hook bolt 6 is hung on the fixed plate 5, and the other end of the hook bolt 6 passes through the mounting hole of the saddle-shaped support 8 and is locked by the locking nut 7, so as to fix the F-shaped connecting plug 1 on the PC insulating sleeve 4.

[0032] In one embodiment, with respect to the design of the connection between the connector and the voltage transformer 29, the other end of the wire core 16 in the F-shaped L-shaped connector plug 1 is connected with a fuse 25 through a fuse connecting lug 23, and the fuse connecting lug 23 and the fuse 25 are connected through a threaded connecting column 24, and the other end of the fuse 25 is provided with a fuse metal head 26. In this embodiment, the other end of the wire core 16 and the rear end of the fuse connecting lug 23 are preferably crimped together by a wire crimping clamp, and the front end of the fuse connecting lug 23 has a threaded hole connected with the copper fuse threaded connecting column 24 and is tightened. One end of the fuse 25 is a copper fuse threaded connecting column 24, and the other end of the fuse 25 is a fuse metal contact 26. The copper fuse threaded connecting column 24 at one end of the fuse 25 is connected with the wire core 16 of the silicon rubber cable through the fuse connecting lug 23, and the metal contact 26 at the other end of the fuse 25 is connected with the contact spring 28 of the coil of the voltage transformer 29 through the L-shaped connector plug 19 passing through the fuse mounting hole of the cable connecting sleeve 27 of the voltage transformer 29 to realize pressure contact connection, forming a voltage loop. That is, the fuse metal head 26 is connected to the voltage transformer 29 through the L-shaped connector plug 19, and the fuse metal head 26 is in pressure contact connection with the contact spring 28 through the cable connecting sleeve 27.

[0033] As another more detailed preferred embodiment, the L-shaped connector plug 19 is fixed on the cable connecting sleeve 27 through a anti-backout assembly, which includes an anti-backout fixing bracket 30, a hook-shaped fixing bolt 31 and a locking nut 32, and the voltage transformer 29 is fixed on the cabinet bottom plate. In addition, the L-shaped connector plug 19 is sequentially provided with an equipotential grounding layer 18, a silicon rubber insulation layer 14 and a silicon rubber cable insulation layer 15 from outside to inside, the equipotential grounding layer 18 of the L-shaped connector plug 19 is provided outside the silicon rubber insulation layer 14 by vulcanization and is integrated with the cable equipotential grounding layer 17 by vulcanization, ensuring the grounding continuity. The L-shaped connector plug 19 is provided with an equipotential shielding layer 22 outside the fuse connecting lug 23 and the fuse 25, and the L-shaped connector plug 19 is provided with a second equipotential grounding lug 33. The equipotential grounding lug 33 is connected with the outer shell of the ring main unit and the grounding copper bar through grounding wires to ensure the grounding continuity of the full-insulation cable connector special for 12kV full-insulation ring main unit, and to meet the requirements of full-insulation touchable, return radius and safe and reliable performance of the full-insulation cable connector special for 12kV full-insulation ring main unit. The equipotential shielding layer 22 inside the L-shaped connector plug 19 is the electric field strength uniformly connecting the fuse connecting lug 23 and the fuse 25, to ensure the insulation strength and insulation performance of the insulation layer of the L-shaped connector plug 19.

[0034] In summary, the full-insulated cable connector of the present application not only satisfies the full-insulated touchable, return radius, safe and reliable performance of the full-insulated cable connector special for 12kV full-insulated ring network cabinet, but also is easy to install and operate, and is suitable for popularization and use.

[0035] The above description of disclosed embodiments enables one of ordinary skill in the art to make and use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fully insulated cable connector comprising a connecting plug and a cabinet fixing assembly at one end of the connecting plug, characterized in that: The connecting plug is an F-shaped connecting plug (1), the F-shaped connecting plug (1) is fixed on the partition plate (2) through a fixing assembly, the F-shaped connecting plug (1) is connected with the conductive rod (3) through a first connecting assembly, and the F-shaped connecting plug (1) is provided with a cavity for accommodating the conductive rod (3), the first connecting assembly comprises a conversion connecting nut (11) connected with the conductive rod (3) and a conductive plug (12) arranged in the conversion connecting nut (11); the F-shaped connecting plug (1) is sequentially provided with an equipotential grounding layer (18), a silicone rubber insulation layer (14), a silicone rubber cable insulation layer (15) and a wire core (16) from outside to inside, the equipotential grounding layer (18) is arranged outside the silicone rubber insulation layer (14) by vulcanization and is integrated with a cable equipotential grounding layer (17); a first equipotential grounding lug (9) is arranged on the outer circle of the F-shaped connecting plug (1), a protective sleeve (13) is arranged at the connecting position of the fixing assembly, and the fixing assembly comprises a fixing plate (5), a hook bolt (6), a locking nut (7) and a saddle-shaped support (8), the fixing plate (5) is fixed on the partition plate (2) through a bolt, the hook bolt (6) is hung on the fixing plate (5), and the other end of the hook bolt (6) penetrates through the mounting hole of the saddle-shaped support (8) and is locked by the locking nut (7); the other end of the wire core (16) is connected with a fuse (25) through a fuse connecting lug (23), and the fuse connecting lug (23) and the fuse (25) are connected through a threaded connecting column (24), and the other end of the fuse (25) is provided with a fuse metal head (26); the fuse metal head (26) is connected on a voltage transformer (29) through an L-shaped connecting plug (19), and the fuse metal head (26) can penetrate through a cable connecting sleeve (27) and be connected with a contact spring (28) on the voltage transformer (29) in pressure contact mode; the L-shaped connecting plug (19) is fixed on the cable connecting sleeve (27) through a anti-back-off assembly, the anti-back-off assembly comprises an anti-back-off fixing support (30), a hook-shaped fixing bolt (31) and a locking nut (32), and the voltage transformer (29) is fixed on the cabinet bottom plate; the L-shaped connecting plug (19) is sequentially provided with an equipotential grounding layer (18), a silicone rubber insulation layer (14) and a silicone rubber cable insulation layer (15) from outside to inside, the equipotential grounding layer (18) of the L-shaped connecting plug (19) is arranged outside the silicone rubber insulation layer (14) by vulcanization and is integrated with a cable equipotential grounding layer (17); an equipotential shielding layer (22) is arranged outside the fuse connecting lug (23) and the fuse (25) in the L-shaped connecting plug (19), and a second equipotential grounding lug (33) is arranged on the equipotential grounding layer (18) of the L-shaped connecting plug (19).

2. An all-insulated cable connector according to claim 1, characterized in that: The tail end of the conductive rod (3) is provided with a threaded hole (10), the outer thread (35) of the conversion connecting nut (11) is screwed and fixed with the threaded hole (10); the outer side of the conductive rod (3) is fixedly provided with an insulating sleeve (4), the insulating sleeve (4) is fixed on the partition plate (2) through a pressing plate and a hook bolt.

3. An all-insulated cable connector according to claim 1 or 2, characterized in that: The inner cavity of the conversion connecting nut (11) is a horn-shaped connecting hole (34), the end of the conductive plug (12) is provided with an elastic contact finger (37), the other end is provided with a cable crimping hole (38) for allowing the end of the wire core (16) to pass in and be pressed tightly, the connecting hole (34) is in interference fit with the elastic contact finger (37) through the cross-shaped elastic contact finger groove (36) at the end of the elastic contact finger (37) and the fitting depth thereof is limited by the positioning partition (39) provided in the middle of the conductive plug (12).

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