A shielded T-joint for switchgear
By introducing a combination design of balancing pads and inner coils into the T-joints used in switchgear, the problem of cable core damage caused by tensile force during cable connection is solved, thereby improving the stability and safety of cable connection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHIRUN ELECTRICITY TECH CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-26
AI Technical Summary
Existing switchgear T-joints are prone to damage to the cable core due to tensile force when connecting busbar cables, resulting in poor contact and weak connection points, which affects the safety and stability of the connection.
The design incorporates a T-joint assembly, equipment sleeve, inner coil, and balancing pad. The balancing pad is placed at the cable gap and works together with the inner coil to distribute the tensile force on the cable to the T-joint body, preventing the cable core from directly bearing the tensile force. The combined structure of the inner coil and balancing pad protects the connection stability between the cable core and the cable joint.
It effectively protects the connection stability between the cable core and the cable joint, avoids damage to the cable core, and ensures the safety and stability of the cable connection.
Smart Images
Figure CN224289218U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a shielded T-joint for switch cabinets. Background Technology
[0002] Shielded T-joints for switchgear are key components used for busbar cable connections in switchgear such as ring main units and gas-insulated switchgear, achieving fully insulated and sealed electrical connections. Existing T-joints are prone to damage to the cable core due to tensile forces during busbar cable connection. Damaged cable cores result in loose crimping, creating "virtual connections" with poor contact, affecting the safety and stability of the connection. Improvements and optimizations are therefore proposed to address this issue. Utility Model Content
[0003] To solve the above problems, the technical problem to be solved by this utility model is to provide a shielded T-type connector for switch cabinets.
[0004] The technical solution adopted by the shielded T-type connector for switchgear of this utility model is as follows: It includes a T-type connector assembly and a device sleeve. The device sleeve includes a conical part of the sleeve and a double-through screw at the upper end of the conical part of the sleeve. The T-type connector assembly includes a T-type connector body, a cable assembly, an inner clamping coil and a balancing pad. The cable assembly includes a cable connector and a cable body. The cable body includes a cable core and a cable insulation layer. The cable connector includes a cable connector crimping part and a cable connector mating part for riveting the cable core. The cable connector mating part is provided with a cable connector mating hole for the double-through screw to pass through. A cable gap is formed between the cable insulation layer and the cable connector crimping part. The balancing pad is sleeved on the cable core and placed at the cable gap. The inner clamping coil is provided with an inner clamping coil clamping hole for sleeved on the outside of the cable insulation layer. The inner clamping coil is placed at the cable gap and its two ends are respectively pressed against the outer wall of the cable insulation layer and the outer wall of the balancing pad.
[0005] The T-joint body includes a horizontally arranged connector routing section and a vertically arranged connector mating section. The connector routing section has a connector routing cavity for inserting the cable body. The inner wall of the connector routing cavity has a routing cavity positioning groove for positioning the inner clamping coil. The connector mating section has, from top to bottom, a connector upper conical groove for installing the insulating plug, a connector mating interface that is horizontally connected to the connector routing cavity and is used for mating the cable connector mating section, and a connector lower conical groove for inserting the sleeve conical section.
[0006] The inner wall of the connector interface is provided with a connector limiting groove for limiting the end of the cable connector mating part.
[0007] The depth of the positioning groove in the wiring cavity is less than 1 mm.
[0008] The T-joint assembly also includes a locking screw. The outer wall of the connector wiring portion is provided with connector threaded holes that communicate with the positioning groove of the wiring cavity at intervals around the arc. The outer wall of the inner clamping coil is provided with an inner clamping coil anti-displacement groove for inserting the end of the locking screw.
[0009] The inner wall of the inner clamping coil clamping hole is provided with inner clamping coil teeth at intervals around an arc for clamping the cable insulation layer and the balance pad. The cross-section of the clamping coil teeth is a triangular structure.
[0010] The advantages of this shielded T-joint for switchgear are: by placing a balancing pad at the cable gap, the tension on the cable is distributed to the T-joint body through the inner coil and the balancing pad, thus avoiding the cable core directly bearing the tension and effectively protecting the connection stability between the cable core and the cable joint. Attached Figure Description
[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0012] Figure 1 This is a partially exploded view of the shielded T-joint for switchgear of this utility model;
[0013] Figure 2 This is a half-sectional view of the T-joint assembly of this utility model;
[0014] Figure 3 This is a half-sectional view of the cable assembly of this utility model;
[0015] Figure 4 This is a half-sectional view of the T-joint body of this utility model;
[0016] Figure 5 This is a half-sectional view of the inner clamping coil of this utility model. Detailed Implementation
[0017] like Figure 1-5As shown, the shielded T-joint for switchgear of this utility model includes a T-joint assembly 1 and an equipment sleeve 2. The equipment sleeve 2 includes a sleeve tapered portion 24 and a double-through screw 25 disposed at the upper end of the sleeve tapered portion 24. The T-joint assembly 1 includes a T-joint body 3, a cable assembly 4, an inner clamping coil 5, and a balancing pad 6. The cable assembly 4 includes a cable connector 16 and a cable body 17. The cable body 17 includes a cable core 20 and a cable insulation layer 21. The cable connector 16 includes a... The cable connector riveting part 18 and the cable connector mating part 19 are riveted to the cable core 20. The cable connector mating part 19 is provided with a cable connector mating hole 23 for the double-through screw 25 to pass through. A cable gap opening 22 is formed between the cable insulation layer 21 and the cable connector riveting part 18. The balance pad 6 is sleeved on the cable core 20 and placed at the cable gap opening 22. The inner clamping coil 5 is provided with an inner clamping coil clamping hole 27 for sleeved on the outside of the cable insulation layer 21. The coil 5 is placed at the cable gap 22, with its inner walls pressed against the outer walls of the cable insulation layer 21 and the outer walls of the balance pad 6, respectively. The T-joint body 3 includes a transversely arranged connector routing section 9 and a longitudinally arranged connector mating section 10. The connector routing section 9 has a connector routing cavity 11 for inserting the cable body 17. The inner wall of the connector routing cavity 11 has a routing cavity positioning groove 28 for positioning the inner clamp coil 5. The connector mating section 10 has, from top to bottom, sections for installing insulating plugs. The conical groove 12 on the connector, the connector mating interface 13 which is horizontally connected to the connector wiring cavity 11 and used for the cable connector mating part 19, and the lower conical groove 14 of the connector for the insertion of the sleeve conical part 24 are placed at the cable gap 22 by the balancing pad 6. Together with the inner clamping coil 5, the tensile force on the cable is distributed to the T-shaped connector body 3 through the inner clamping coil 6 and the balancing pad 22, avoiding the cable core 20 from directly bearing the tensile force and effectively protecting the connection stability between the cable core 20 and the cable connector 16.
[0018] The balancing pad 6 serves to balance the force on both ends and buffer the inner clamp coil 6 when it is clamped. The inner clamp coil 6 is set at the cable gap 22 to facilitate its installation.
[0019] The inner wall of the connector interface 13 is provided with an interface limiting groove 29 for limiting the end of the cable connector mating part 19, so that the cable assembly 4 is accurately positioned and structurally stable when installed into the T-shaped connector body 3, and is not easily swayed.
[0020] The depth of the wiring cavity positioning groove 28 is less than 1mm, which plays a slight positioning role for the inner clamping coil 5. If it is too deep, it will be difficult to install the inner clamping coil 5.
[0021] The T-joint assembly 1 also includes a locking screw 7. The outer wall of the connector wiring portion 9 is provided with a connector threaded hole 30 that communicates with the wiring cavity positioning groove 28 at intervals around the arc. The outer wall of the inner clamping coil 5 is provided with an inner clamping coil anti-displacement groove 31 for inserting the end of the locking screw 7, which effectively prevents the inner clamping coil 5 from shifting and failing when subjected to the tension of the cable core.
[0022] The inner wall of the inner clamping coil clamping hole 27 is provided with inner clamping coil clamping teeth 32 at intervals around the arc for clamping the cable insulation layer 21 and the balance pad 6. The cross-section of the clamping coil clamping teeth 32 is a triangular structure. The triangular clamping tooth design provides high friction, prevents the cable insulation layer from sliding, and reduces the risk of damage to the cable core.
[0023] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model are included within the protection scope of the present utility model.
Claims
1. A shielded T-joint for switchgear, comprising a T-joint assembly (1) and a sleeve (2), wherein the sleeve (2) includes a sleeve tapered portion (24) and a double-through screw (25) disposed at the upper end of the sleeve tapered portion (24), characterized in that: The T-joint assembly (1) includes a T-joint body (3), a cable assembly (4), an inner coil (5), and a balancing pad (6). The cable assembly (4) includes a cable connector (16) and a cable body (17). The cable body (17) includes a cable core (20) and a cable insulation layer (21). The cable connector (16) includes a cable connector crimping part (18) for riveting the cable core (20) and a cable connector mating part (19). The cable connector mating part (19) is provided with an electric guide for the double-through screw (25) to pass through. The cable connector mating hole (23) forms a cable gap opening (22) between the cable insulation layer (21) and the cable connector riveting part (18). The balance pad (6) is sleeved on the cable core (20) and placed at the cable gap opening (22). The inner clamping coil (5) is provided with an inner clamping coil clamping hole (27) for sleeved outside the cable insulation layer (21). The inner clamping coil (5) is placed at the cable gap opening (22) and its inner wall ends are respectively pressed against the outer wall of the cable insulation layer (21) and the outer wall of the balance pad (6). The T-shaped connector body (3) includes a connector wiring section (9) arranged laterally and a connector mating section (10) arranged longitudinally. The connector wiring section (9) is provided with a connector wiring cavity (11) for inserting the cable body (17). The inner wall of the connector wiring cavity (11) is provided with a wiring cavity positioning groove (28) for positioning the inner clamping coil (5). The connector mating section (10) is provided with a connector upper conical groove (12) for installing the insulating plug, a connector mating interface (13) that is horizontally connected to the connector wiring cavity (11) and is used for mating the cable connector mating section (19), and a connector lower conical groove (14) for inserting the sleeve conical section (24).
2. The shielded T-joint for switchgear according to claim 1, characterized in that: The inner wall of the connector interface (13) is provided with an interface limiting groove (29) for limiting the end of the cable connector mating part (19).
3. The shielded T-joint for switchgear according to claim 1, characterized in that: The depth of the positioning groove (28) of the wiring cavity is less than 1 mm.
4. The shielded T-joint for switchgear according to claim 3, characterized in that: The T-joint assembly (1) also includes a locking screw (7), the outer wall of the connector wiring part (9) is provided with a connector thread hole (30) that communicates with the wiring cavity positioning groove (28) at intervals around the arc, and the outer wall of the inner clamping coil (5) is provided with an inner clamping coil anti-displacement groove (31) for inserting the end of the locking screw (7).
5. The shielded T-joint for switchgear according to claim 1, characterized in that: The inner wall of the inner clamping coil clamping hole (27) is provided with inner clamping coil clamping teeth (32) at intervals around the arc for clamping the cable insulation layer (21) and the balance pad (6). The cross-section of the clamping coil clamping teeth (32) is a triangular structure.