Split heavy-duty bus plug structure

Abstract

A split heavy load bus plug structure, comprising a plug box and a bus duct; the plug box is provided with a connecting contact, the connecting contact comprises a plurality of contact pieces arranged corresponding to bus bar conductors in the bus duct, and a connecting block connected with the plug box; the connecting block extends to both sides from the side wall of the plug box, the connecting block is provided with a connecting groove corresponding to the contact pieces, and the contact pieces are connected with the bus bar conductors through the connecting groove; the contact piece comprises a first connecting end connected with the bus bar conductor, and a second connecting end connected with a load side conductive component; the end of the first connecting end is concave to form a plug groove matched with the bus bar conductor, and the inner side wall of the plug groove is provided with a connecting spring piece; when the first connecting end is plugged into the bus bar conductor, the connecting spring piece elastically abuts against the bus bar conductor. The design of the connecting contact solves the problems of mutual restraint of the plug box and the bus duct in the heavy load bus plug structure, and unreliable connection.

Description

Technical Field

[0001] This utility model belongs to the field of power transmission, and in particular relates to a split-type heavy-duty busbar plug-in structure. Background Technology

[0002] In electrical power distribution systems, busbar trunking serves as an efficient power transmission carrier, undertaking the core function of transmitting power from the power supply end to various power consumption areas. Plug-in boxes are key components that draw power from the busbar trunking and distribute it to terminal electrical equipment. The two are electrically connected through a specific plug-in structure, together forming a flexible and reliable power distribution network, widely used in large industrial plants, commercial complexes, data centers, and other scenarios requiring high current transmission and flexible power distribution.

[0003] Traditional busbar trunking sockets are divided into two structures based on the current rating of the socket box: small-current socket boxes use pin-type plug-in power supply and are a separate design, meaning the socket box and the busbar trunking are independent components that can be manufactured, supplied, and installed separately. During the installation of the busbar trunking, there is no need to wait for the socket box to be completed, effectively ensuring the installation progress of the busbar trunking. On the other hand, large-current socket boxes adopt an integrated structure. The connection between the socket box and the busbar trunking is achieved by welding copper busbars to the busbar socket and then connecting them to the incoming line terminals of the circuit breaker inside the socket box with bolts. This makes the busbar trunking and the socket box an inseparable whole, requiring simultaneous production and supply.

[0004] For high-current plug-in boxes with an integrated structure, their production schedule directly determines the delivery schedule of the busbar trunking. Since circuit breakers are the core component within the plug-in box, their procurement cycle is typically long, which extends the production cycle of the plug-in box and consequently prolongs the delivery time of the busbar trunking. This problem is particularly prominent in large-scale engineering projects, where delays in busbar trunking delivery often affect the entire project's installation schedule, increasing time costs and management complexity, and making it difficult to meet the demands of modern engineering projects for efficient and flexible power distribution system installation. Utility Model Content

[0005] The purpose of this utility model is to provide a split-type heavy-duty busbar plug-in structure to solve the technical problem of connecting the plug-in box and busbar trunking of heavy-duty busbars.

[0006] To achieve the above objectives, the specific technical solution of this utility model for a split-type heavy-duty busbar plug-in structure is as follows:

[0007] A split-type heavy-duty busbar plug-in structure includes a plug-in box and a busbar trunking.

[0008] The plug-in box is equipped with a connecting contact head, which includes a plurality of contact pieces corresponding to the busbar conductors in the busbar trough, and a connecting block connected to the plug-in box. The connecting block extends from the side wall of the plug-in box to both sides, with one end located inside the plug-in box and the other end connected to the busbar trough outside the plug-in box. The connecting block is provided with a connecting groove corresponding to the contact pieces, and the contact pieces pass through the connecting groove to connect to the busbar conductors.

[0009] The contact piece includes a first connection end connected to the busbar conductor and a second connection end connected to the load-side conductive component; the end of the first connection end is recessed to form a plug groove that matches the busbar conductor, and a connecting spring is provided on the inner side wall of the plug groove; when the first connection end is plugged into the busbar conductor, the connecting spring elastically abuts against the busbar conductor.

[0010] As a further improvement of this utility model, a connection port is provided on the connection side of the busbar trunking and the plug-in box. The connection port is for the insertion of the connection block, and the contact piece passes through the connection port to connect with the busbar conductor.

[0011] As a further improvement of this utility model, a positioning protrusion is provided on the outer surface of the plug box facing the busbar groove on the outer periphery of the connecting block, and a positioning groove is provided on the outer periphery of the busbar groove corresponding to the positioning protrusion. The positioning protrusion enters the positioning groove to realize the connection and positioning of the plug box and the busbar groove.

[0012] As a further improvement of this utility model, the two sides of the middle part of the contact piece protrude to form connecting protrusions, and the inner wall of the connecting groove is provided with connecting grooves corresponding to the connecting protrusions. The contact piece is installed on the connecting block through the connecting protrusions and the connecting grooves.

[0013] As a further improvement of this utility model, there is a certain gap between the connecting protrusion and the connecting groove.

[0014] As a further improvement of this utility model, the second connecting end is bent in a stepped manner from both sides towards the middle.

[0015] As a further improvement of this utility model, the inner sidewall of the insertion slot is provided with a spring slot along the length direction of the busbar conductor. The two sidewalls of the spring slot along the insertion direction are inclined towards each other from both ends of the bottom surface to the opening. The connecting spring includes a protruding part that protrudes towards the busbar conductor and a connecting part provided on both sides of the protruding part. The connecting part is engaged between the inclined sidewall and the bottom surface of the spring slot, and the protruding part protrudes from the opening of the spring slot.

[0016] As a further improvement of this utility model, a connecting strip is provided on the outer surface of the connecting block, and a connecting hole is provided on the connecting strip. A bolt passes through the connecting hole to fix the connecting block on the plug box.

[0017] As a further improvement of this utility model, the plug-in structure of this utility model also includes a power monitoring system. The power monitoring system includes a sensor disposed at the connection point between the connecting contact and the busbar conductor, and a controller connected to the sensor. The controller receives and processes the data collected by the sensor, and realizes early warning, fault location and judgment through set thresholds and algorithms.

[0018] As a further improvement of this utility model, the second connection end is provided with a wiring terminal, which is detachably connected to the load-side conductive component by bolts.

[0019] Beneficial effects:

[0020] This application utilizes a connecting contact consisting of a connecting block and contact pieces to create a separate structure for the plug-in box and the busbar trunking. One end of the connecting block is located inside the plug-in box, while the other end connects to the busbar trunking. The contact pieces pass through the plug-in slots of the connecting block and respectively connect to the busbar conductors and the load-side conductive components, eliminating the need for them to be bonded together. This design allows the plug-in box and busbar trunking to be manufactured and supplied independently, avoiding the problem of long circuit breaker procurement cycles that hinder busbar delivery in traditional high-current plug-in boxes, and significantly improving the flexibility of engineering installation schedules.

[0021] The first connection end of the contact piece connects to the busbar conductor through a recessed insertion slot, and the connecting spring piece on the inner side wall of the insertion slot elastically abuts against the busbar conductor. This not only ensures tight contact between the two through elasticity, reducing contact resistance to meet the requirements of heavy-load current transmission, but also automatically compensates for possible positional deviations during the insertion process, ensuring reliable connection. At the same time, several contact pieces are set for different busbar conductors (such as PE, A, B, C, N), which can accurately match three-phase five-wire power distribution systems and meet the electrical connection requirements under heavy-load scenarios.

[0022] The connecting block extends from the side wall of the plug-in box and runs through a connecting groove. The contact piece directly passes through the connecting groove to complete the connection with the busbar conductor and the load side, eliminating the need for complex welding or bolt fixing processes. This integrated plug-in structure design reduces the number of parts and assembly steps, making the docking process between the plug-in box and the busbar trunking simpler and more efficient, and reducing installation difficulty and labor costs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a split-type heavy-duty busbar plug-in structure according to the present invention;

[0024] Figure 2A schematic diagram of the plug-in box and busbar structure;

[0025] Figure 3 This is a schematic diagram of the contact head structure;

[0026] Figure 4 This is an exploded view of the connecting contact head;

[0027] Figure 5 This is a cross-sectional view of the connecting head;

[0028] Explanation of markings in the diagram: 1. Plug-in box; 11. Connecting contact head; 111. Contact piece; 1111. First connecting end; 11111. Plug-in slot; 11112. Spring slot; 1112. Second connecting end; 1113. Connecting protrusion; 112. Connecting block; 1121. Connecting groove; 11211. Connecting recess; 1122. Connecting strip; 11221. Connecting hole; 113. Connecting spring; 1131. Protrusion; 1132. Connecting part; 2. Busbar trough; 21. Busbar conductor; 22. Connecting port. Detailed Implementation

[0029] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0030] Implementation example:

[0031] like Figure 1 and 2 The diagram illustrates a split-type heavy-duty busbar plug-in structure, comprising a plug-in box 1 and a busbar trunking 2. The plug-in box 1 and busbar trunking 2 are two independent components, connected detachably by a connecting contact 11, unlike the traditional high-current plug-in structure where the busbar trunking and plug-in box are integrally formed and cannot be separated. The plug-in box 1 serves as the carrier for drawing power from the busbar trunking 2 and supplying power to the load equipment. Its bottom has a pre-reserved mounting position for the connecting contact 11 to pass through, and its interior accommodates one end of the connecting contact 11 and load-side conductive components (such as cables, internal busbars, etc.). The busbar trunking 2 contains busbar conductors 21 extending along its length. In this embodiment, it includes five busbar conductors: PE, B, B, C, and N, used for transmitting electrical energy. A connection port 22 is provided on the side of the busbar trunking 2 corresponding to the plug-in box 1 for the connecting contact 11 to enter, ensuring effective contact between the busbar conductors 21 and the connecting contact 11. The lower end face of the plug-in box 1 is provided with a positioning protrusion on the outer periphery of the connecting block 112. The busbar trunking is provided with a positioning groove on the outer periphery of the connecting port corresponding to the positioning protrusion. During installation, the positioning protrusion is aligned with the positioning groove to achieve precise positioning. Then, the plug-in box 1 and the busbar trunking 2 are fixed by welding, eliminating the use of fastening bolts, simplifying the installation process, reducing the installation difficulty, and improving the installation efficiency.

[0032] like Figure 3-5 As shown, the connecting contact 11 extends from the plug-in box 1 and connects to the busbar trough 2. It includes five contact pieces 111 corresponding to the busbar conductor 21, and a connecting block 112 for mounting the contact pieces 111. The contact pieces 111 are made of T2 copper with a silver-plated surface. They are elongated and bent, possessing good conductivity and mechanical strength. One bent end is the second connecting end 1112, equipped with a terminal block, which can be detachably connected to the load-side conductive component via bolts, facilitating stable connection with various load-side conductive components. The other end, connected to the busbar conductor 21, is the first connecting end 1111. The end of the first connecting end 1111 is recessed to form a dovetail-shaped plug-in groove 11111. The shape of this plug-in groove 11111 is adapted to fit the busbar conductor 21 in the busbar trough 2, accommodating the busbar conductor 21. Meanwhile, the inner wall of the insertion slot 11111 is fitted with a connecting spring 113 via the spring slot 11112. The connecting spring 113 is made of a metal material with a certain degree of elasticity and excellent conductivity. The connecting spring 113 has an arc-shaped protrusion on one side, and the protrusion 1131 clamps the busbar conductor 21 from both sides. The connecting spring 113, through its own elasticity, can effectively ensure that the heavy-duty contact is tightly connected to the busbar conductor, meeting the requirements of low resistance and low heat generation current carrying performance. The spring slot 11112 is set along the length of the busbar conductor 21, with the bottom surface larger than the opening. The side walls on both sides are inclined towards each other, so that the protrusion 1131 of the connecting spring 113 can protrude from the opening through its own elasticity. The connecting parts 1132 on both sides of the protrusion 1131 are relatively smoothly engaged between the side wall and the bottom surface.

[0033] The connecting block 112 passes through the mounting position at the bottom of the plug-in box 1. The outer connecting strip 1122 is provided with a connecting hole 11221. The bolt passes through the connecting hole 11221 to fix the connecting block 112 to the bottom of the plug-in box 1. One end of the connecting block 112 protrudes relative to the bottom of the plug-in box 1, and the other end passes through the plug-in box 1 to enter the connection port 22 of the busbar trough 2. The connecting block 112 has 5 connecting grooves 1121 running from top to bottom for the contact piece 111 to pass through. The shape of the connecting groove 1121 matches the shape of the contact piece 111. A connecting groove 11211 is provided corresponding to the connecting protrusion 1113 in the middle of the contact piece 111. The connecting protrusion 1122 enters the connecting groove 11211 to install the contact piece 111. The connecting protrusion 1113 has a certain gap with the connecting groove 11211, providing a certain amount of room for the contact piece to move, allowing it to make slight positional adjustments within the connecting groove 1121 of the connecting block 112. This ensures that the first connecting end of the contact piece 111 can accurately align with the busbar conductor 21 in the busbar groove 2, avoiding assembly difficulties or poor contact caused by rigid alignment. It also provides a certain amount of floating adjustment space for the contact piece, further improving the adaptability and reliability of the connection.

[0034] The plug-in structure of this application also includes a power monitoring system. This system comprises a current sensor and a temperature sensor located at the connection point between the contact piece 111 and the busbar conductor 21, as well as a controller electrically connected to the current sensor and temperature sensor. The controller receives and processes data collected by the sensors regarding the power supply to the plug-in box and the busbar trunking. Through set thresholds and intelligent algorithms, it achieves early warning, rapid fault location, and judgment functions. This allows for timely detection of potential problems and the implementation of corrective measures, effectively ensuring the safe and stable operation of the busbar plug-in structure and the entire power distribution system, and improving the system's intelligent operation and maintenance level.

[0035] In summary, the structure of this application, through the connecting contact 11, makes the plug-in box 1 and the busbar trunking 2 independent units, which can be manufactured, supplied, and installed separately, without being restricted by the "busbar and plug-in box as one" constraint in traditional high-current plug-in boxes. Even if the circuit breaker procurement cycle is long, it will not affect the production, delivery, and installation progress of the busbar trunking, effectively shortening the overall project delivery time and improving project efficiency. A connecting spring 113 is provided in the plug-in groove 11111 of the first connecting end 1111 of the contact piece 111. When plugging in the busbar conductor 21, it achieves tight contact through elastic abutment, which can effectively compensate for small positional deviations during the connection process, reduce contact resistance, reduce heat generation, and ensure stable transmission of heavy-load currents such as 1600A. At the same time, the contact piece 111 and the connecting block 112 are installed through the connecting protrusion 1113 and the connecting groove 11211, and there is a gap between them, which provides a certain floating adjustment space for the contact piece 111, further improving the adaptability and reliability of the connection. Busbar 2 and plug-in box 1 are quickly connected through connection port 22. The positioning protrusion on the outer surface of plug-in box 1 matches the positioning groove of busbar 2. The second connection end 1112 of contact piece 111 adopts a stepped design that bends to both sides and is equipped with a terminal with through hole, which facilitates detachable connection with the conductive parts on the load side. This not only avoids mutual interference during connection, but also provides convenience for later maintenance and replacement of load equipment. At the same time, the modular design of the connecting contact 11 also facilitates individual maintenance or replacement, reducing maintenance costs.

[0036] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A split-type heavy-duty busbar plug-in structure, characterized in that, Includes plug-in boxes and busbar trunking; The plug-in box is equipped with a connecting contact head, which includes a plurality of contact pieces corresponding to the busbar conductors in the busbar trough, and a connecting block connected to the plug-in box. The connecting block extends from the side wall of the plug-in box to both sides, with one end located inside the plug-in box and the other end connected to the busbar trough outside the plug-in box. The connecting block is provided with a connecting groove corresponding to the contact pieces, and the contact pieces pass through the connecting groove to connect to the busbar conductors. The contact piece includes a first connection end connected to the busbar conductor and a second connection end connected to the load-side conductive component; the end of the first connection end is recessed to form a plug groove that matches the busbar conductor, and a connecting spring is provided on the inner side wall of the plug groove; when the first connection end is plugged into the busbar conductor, the connecting spring elastically abuts against the busbar conductor.

2. The split-type heavy-duty busbar plug-in structure according to claim 1, characterized in that, The busbar trunking is provided with a connection port on the connection side with the plug box. The connection port is for the insertion of the connection block, and the contact piece passes through the connection port to connect with the busbar conductor.

3. The split-type heavy-duty busbar plug-in structure according to claim 2, characterized in that, The outer surface of the plug box facing the busbar groove has a positioning protrusion on the outer periphery of the connecting block. The busbar groove has a positioning groove on the outer periphery of the connecting port corresponding to the positioning protrusion. The positioning protrusion enters the positioning groove to realize the connection and positioning of the plug box and the busbar groove.

4. The split-type heavy-duty busbar plug-in structure according to claim 1, characterized in that, The contact piece has connecting protrusions on both sides of its middle portion, and the inner wall of the connecting groove is provided with connecting grooves corresponding to the connecting protrusions. The contact piece is installed on the connecting block through the connecting protrusions and the connecting grooves.

5. The split-type heavy-duty busbar plug-in structure according to claim 4, characterized in that, There is a certain gap between the connecting protrusion and the connecting groove.

6. The split-type heavy-duty busbar plug-in structure according to claim 1, characterized in that, The second connecting end bends in a stepped manner from both sides toward the middle.

7. The split-type heavy-duty busbar plug-in structure according to claim 1, characterized in that, The inner wall of the insertion slot is provided with a spring slot along the length of the busbar conductor, and the spring slot is inclined from both ends of the bottom surface toward the opening along the two side walls of the insertion direction. The connecting spring includes a protrusion facing the busbar conductor and connecting portions disposed on both sides of the protrusion; the connecting portions are engaged between the inclined sidewall and the bottom surface of the spring groove, and the protrusion protrudes from the opening of the spring groove.

8. The split-type heavy-duty busbar plug-in structure according to claim 1, characterized in that, The outer surface of the connecting block has a protruding connecting strip with a connecting hole. A bolt passes through the connecting hole to fix the connecting block to the plug box.

9. The split-type heavy-duty busbar plug-in structure according to claim 1, characterized in that, It also includes a power monitoring system, which includes a sensor installed at the connection point between the connecting contact and the busbar conductor, and a controller connected to the sensor; the controller receives and processes the data collected by the sensor, and realizes early warning, fault location and judgment through set thresholds and algorithms.

10. The split-type heavy-duty busbar plug-in structure according to claim 1, characterized in that, The second connection end is provided with a wiring terminal, which is detachably connected to the load-side conductive component by bolts.

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