A quick-plug base for ring network cabinet

Abstract

The present invention belongs to the technical field of electrical connection equipment, and in particular relates to a quick-plug base for a ring network cabinet, comprising a copper core, an insulating sleeve and a metal shell which are arranged in sequence from the inside to the outside, the insulating sleeve is provided with a through hole and a cavity I, one end of the copper core is flush with the insulating sleeve, and the other end is passed through the through hole until it reaches the cavity I, and the end of the copper core which passes into the cavity I is provided with an external thread for connecting the insulator; the copper core is provided with a stepped countersunk hole along its length direction, the inner diameter of the end of the stepped countersunk hole which is flush with the insulating sleeve is larger than the inner diameter of the end of the stepped countersunk hole which faces the cavity I, and the end of the stepped countersunk hole with the larger inner diameter is used for plugging in the cable core of the cable, the metal shell is arranged on the outside of the insulating sleeve, and a gap is left between the metal shell and the end which is flush with the insulating sleeve and the copper core to form a cavity II for installing the plug-in connector of the cable, the installation is very fast, and the operating efficiency of the busbar connection is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical connection equipment, in particular to the technical field of busbar connection, and more particularly to a quick-plug base for a ring network cabinet. Background Art

[0002] In the process of designing, installing and using 24kV and below gas-insulated metal-enclosed switchgear, busbar connectors are often used for splicing between switchgears. However, the existing busbar connectors are complicated to connect, and a large part of their connection stability depends on on-site manual operation. In addition, the existing busbar connectors are large in size and inconvenient for on-site installation. Summary of the invention

[0003] In order to overcome the problem of complex installation when performing on-site busbar connection in the prior art, the present invention proposes a quick plug-in base, which is achieved through the following technical solutions:

[0004] A quick-plug base for a ring network cabinet, one end of which is connected to an insulator and the other end is connected to a cable, comprising a copper core, an insulating sleeve and a metal shell arranged in sequence from the inside to the outside, the insulating sleeve being a convex structure, with a through hole and a cavity I provided, one end of the copper core being flush with the insulating sleeve and the other end being passed through the through hole until entering the cavity I, and the end of the copper core passing through the cavity I being provided with an external thread for connecting to the insulator; the copper core being provided with a stepped countersunk hole along its length, the inner diameter of the end of the stepped countersunk hole being flush with the insulating sleeve being larger than the inner diameter of the end of the stepped countersunk hole facing the cavity I, and the end of the stepped countersunk hole having a larger inner diameter being used for plugging in the cable core of the cable, the metal shell being provided on the outside of the insulating sleeve, and a gap being left between the metal shell and the end of the insulating sleeve and the copper core being flush, forming a cavity II for installing a plug-in connector of the cable.

[0005] Furthermore, the metal shell is connected to the plug-in connector of the cable through a clamping mechanism.

[0006] Furthermore, the clamping mechanism includes an active clamping ring and a ball, an annular groove is provided at the end position where the metal shell is connected to the cable, the active clamping ring is sleeved in the annular groove, and the annular groove is provided with a ball mounting groove, the ball mounting groove is provided with a plurality of slot holes, the ball is mounted in the slot holes, and the aperture of the slot holes facing the inside of the metal shell is smaller than the diameter of the ball, the active clamping ring is provided with a stop plate at the position corresponding to the ball mounting groove, when the active clamping ring is in the highest position, the stop plate is against the upper spherical surface of the ball; when the active clamping ring is in the lowest position, the stop plate is against the lower spherical surface of the ball.

[0007] Furthermore, friction stripes are arranged on the outer surface of the movable snap ring.

[0008] Furthermore, the annular groove is also sleeved with a grounding metal ring.

[0009] Furthermore, a groove is formed on the lower end surface of the movable clamping ring, and a clamping column matching the groove is disposed on the annular groove.

[0010] Furthermore, a shielding layer is arranged between the insulating sleeve and the metal shell.

[0011] Furthermore, the insulating sleeve is provided with a stress cone at the connection between the copper core and the cavity I.

[0012] Furthermore, a contact ring contacting with the cable core of the cable is arranged in the stepped countersunk hole.

[0013] Furthermore, one end of the insulating sleeve that is flush with the copper core protrudes from the metal shell.

[0014] The invention discloses a quick-plug base for a ring network cabinet, which has the beneficial effects of: one end is connected by screwing on an insulating sleeve installed on the high-voltage cabinet, and the other end is directly connected to the plug-in connector of the cable, which is very quick to install and greatly improves the operational efficiency of the busbar connection. In addition, the quick-plug base is small in size while ensuring the reliability of the electrical connection, thereby reducing the cabinet size and design cost of the high-voltage cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a quick-plug base in an embodiment of the present invention;

[0016] Figure 2 A cross-sectional view of a quick-plug base in an embodiment of the present invention;

[0017] Figure 3 It is a front view of the present invention;

[0018] Figure 4 A top view of the present invention;

[0019] Figure 5 A bottom view of the present invention;

[0020] In the figure: 1, copper core, 101, stepped countersunk hole, 2, insulating sleeve, 201, cavity I, 202, cavity II, 3, metal shell, 301, annular groove, 302, clamping column, 4, shielding layer, 5, stress cone, 6, grounding metal ring, 7, movable clamping ring, 701, abutment plate, 702, groove, 8, ball. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments. The embodiments described are only a part of the present invention. These embodiments are only used to explain the present invention and do not constitute any limitation to the scope of the present invention.

[0022] As the instruction manual Figure 1-5 As shown, a quick-plug base for a ring network cabinet has an overall cylindrical structure, including a copper core 1, an insulating sleeve 2 and a metal shell 3 arranged in sequence from the inside to the outside, the metal shell 3 is sleeved on the outside of the insulating sleeve 2 to provide overall protection for the quick-plug base; a copper core 1 is passed through the middle of the insulating sleeve 2 for electrical insulation; one end of the copper core 1 is connected to the insulating sleeve, and the other end is connected to the cable of the branch box. In one embodiment, the insulating sleeve 2 is a convex structure, and is provided with a through hole and a cavity Ⅰ201 connected to the through hole. The through hole is used to pass the copper core 1. One end of the copper core 1 is flush with the end of the insulating sleeve 2 with a smaller diameter, and the other end is passed through the cavity Ⅰ201. The copper core 1 is provided with a stepped countersunk hole 101 along its length direction. The inner diameter of the stepped countersunk hole 101 at one end facing the cavity Ⅰ201 is smaller than the inner diameter of the other end. The portion with a larger inner diameter of the stepped countersunk hole 101 is used to plug in the cable core of the cable (referred to as the cable connection end), and a contact ring for contacting the cable core is provided to reduce the contact resistance between the cable core and the copper core 1; the portion with a smaller inner diameter of the stepped countersunk hole 101 is longer than the portion with a larger inner diameter of the stepped countersunk hole 101, and is used as a pressure equalizing tube. The cavity Ⅰ201 has a conical structure, which matches the shape of the insulating sleeve, and the copper core 1 is placed in the cavity Ⅰ201. The part is provided with an external thread (called the insulating sleeve connection end) to match and screw with the internal thread of the insulating sleeve conductive column. That is, one end of the quick-plug base is connected to the insulating sleeve installed on the high-voltage cabinet by screwing, and the other end is connected to the cable of the branch box by clamping, thereby greatly reducing the installation difficulty of the busbar connection and improving work efficiency.

[0023] In order to ensure the reliable stability of the connection between the quick-plug base and the branch box cable, the branch box cable adopts a plug-in connector, and a gap is left between the end of the insulating sleeve 2 and the copper core 1 that is flush with the metal shell 3 to form a cavity II202 for setting a clamping mechanism, which is connected to the plug-in connector of the cable through the clamping mechanism. Specifically, the clamping mechanism includes a movable clamping ring 7 and a ball 8, wherein an annular groove 301 is provided at the end of the metal shell 3 connected to the cable, and the movable clamping ring 7 is sleeved in the annular groove 301 and moves up and down. In addition, the annular groove 301 provides an annular ball installation groove, and the ball installation groove provides a plurality of slot holes, and the ball 8 is installed in the slot hole. The aperture of the slot hole facing the movable clamping ring 7 is larger than the diameter of the ball 8, and the aperture of the slot hole facing the inside of the metal shell 3 is smaller than the diameter of the ball 8, and the movable clamping ring 7 is opposite. A stop plate 701 is set at the position of the ball mounting groove. When the movable snap ring 7 is at the highest position, the stop plate 701 presses against the upper spherical surface of the ball 8; when the movable snap ring 7 is at the lowest position, the stop plate 701 presses against the lower spherical surface of the ball 8, so that the ball is always pressed in the slot by the stop plate 701. However, when the stop plate 701 presses against the upper spherical surface of the ball 8, the ball 8 is squeezed and restricted in the slot and cannot move. When the stop plate 701 presses against the lower spherical surface of the ball 8, the ball 8 has space to move in the slot.

[0024] In the absence of external force, the movable snap ring 7 is pushed to the top by the force of the ball 8, and the plate 701 presses the ball 8 inward to complete the clamping operation of the plug-in connector of the cable; when the plug-in connector of the cable is pulled out or inserted, the movable snap ring 7 needs to be pushed down first, the plate 701 moves down, and the slot hole provides space for the ball to move, causing the ball 8 to loosen, completing the plug-out or insertion operation of the cable plug-in connector. Furthermore, during operation, in order to better move the movable snap ring 7, friction stripes are set on its outer wall, and a groove 702 is opened on the lower end face of the movable snap ring 7. The annular groove 301 is provided with a clamping column 302 matching the groove 402, and the movable snap ring 7 after being pushed down is docked through the groove 402 and the clamping column 302, so that it is not affected by the force of the ball, giving sufficient time to complete the docking of the plug-in connector of the cable with the cavity II.

[0025] Furthermore, in order to improve the reliability and stability of the electrical connection, a shielding layer 4 is provided between the insulating sleeve 2 and the metal shell 3; a stress cone 5 is provided at the connection between the copper core 1 and the cavity Ⅰ201 of the insulating sleeve 2; and a grounding metal ring 6 is also provided in the annular groove 301.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A quick-plug base for a ring main unit, one end of which is connected to an insulator and the other end is connected to a cable, comprising a copper core, an insulating sleeve and a metal shell arranged in sequence from the inside to the outside, characterized in that: The insulating sleeve is a convex structure, with a through hole and a cavity I. One end of the copper core is flush with the insulating sleeve, and the other end is passed through the through hole until it reaches the cavity I. The end of the copper core that passes through the cavity I is provided with an external thread for connecting the insulator. The copper core is provided with a stepped countersunk hole along its length. The inner diameter of the end of the stepped countersunk hole that is flush with the insulating sleeve is larger than the inner diameter of the end of the stepped countersunk hole that faces the cavity I. The end of the stepped countersunk hole with a larger inner diameter is used to plug in the cable core of the cable. The metal shell is arranged on the outside of the insulating sleeve, and a gap is left between the metal shell and the end of the insulating sleeve and the copper core that is flush, forming a cavity II for installing the plug-in connector of the cable. The metal shell is connected to the plug-in connector of the cable through a clamping mechanism. The clamping mechanism includes a movable clamping ring and a ball. An annular groove is provided at the end of the metal shell connected to the cable. A grounding metal ring is also provided in the annular groove. A groove is provided on the lower end surface of the movable clamping ring. A clamping column matching the groove is provided in the annular groove.

2. A quick-plug base for a ring main unit according to claim 1, characterized in that: The movable snap ring is sleeved in the annular groove to move up and down, and the annular groove is provided with a ball mounting groove, and the ball mounting groove is provided with a plurality of slot holes, the balls are mounted in the slot holes, and the aperture of the slot holes toward the inside of the metal shell is smaller than the diameter of the balls, and the movable snap ring is provided with a stop plate at a position corresponding to the ball mounting groove, and when the movable snap ring is in the highest position, the stop plate presses against the upper spherical surface of the ball; when the movable snap ring is in the lowest position, the stop plate presses against the lower spherical surface of the ball.

3. A quick-plug base for a ring main unit according to claim 2, characterized in that: The outer surface of the movable clamping ring is provided with friction stripes.

4. A quick-plug base for a ring main unit according to any one of claims 1 to 3, characterized in that: A shielding layer is also arranged between the insulating sleeve and the metal shell.

5. A quick-plug base for a ring main unit according to claim 4, characterized in that: The insulating sleeve is provided with a stress cone at the connection between the copper core and the cavity I.

6. A quick-plug base for a ring main unit according to claim 5, characterized in that: A contact ring in contact with the cable core of the cable is arranged in the stepped countersunk hole.

7. A quick-plug base for a ring main unit according to claim 6, characterized in that: One end of the insulating sleeve flush with the copper core protrudes from the metal shell.

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