A floating heavy load detachable contact plug structure

Abstract

A floating, heavy-duty, detachable contact plug-in structure includes a plug-in box, a busbar trunking, and connecting contacts. The connecting contacts include several contact pieces and connecting blocks. The connecting blocks extend 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 trunking on the outside of the plug-in box. Connecting slots are provided on the connecting blocks corresponding to the contact pieces, allowing the contact pieces to pass through the connecting slots and connect to the busbar conductors. Each contact piece includes a first connecting end and a second connecting end. The first connecting end has a recessed plug-in groove, and a connecting spring is provided on the inner side of the side wall of the plug-in groove. When the first connecting end is plugged into the busbar conductor, the connecting spring elastically abuts against the busbar conductor. The plug-in groove includes a first side wall and a second side wall. The first side wall and the contact piece are integrally formed, while the second side wall is detachably connected to the contact piece. This invention solves the problems of existing high-current plug-in structures where the busbar trunking and plug-in box cannot be supplied separately, and the plug-in connectors cannot be adapted to different specifications of busbar conductors.

Description

Technical Field

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

[0002] In power transmission and distribution systems, plug-in boxes, as an important component of busbar systems, play a crucial role in drawing power from the busbars and distributing it to various electrical devices. Busbars, as a highly efficient current transmission medium, are widely used in various buildings and industrial sites to ensure stable power delivery. Plug-in boxes, acting as "branch hubs" of the busbars, enable flexible power distribution and use through effective connections with the busbars.

[0003] Traditional busbar trunking connectors are mainly divided into two structures based on the current rating of the connector box. For low-current connector boxes, a pin-plug connection method is typically used for power supply, resulting in a separate structure. The advantage of this structure is that the connector box and the busbar can be supplied separately. In actual engineering installations, the installation progress of the busbar trunk line is not affected by the connector box. Construction personnel can install the busbar first, and then install the connector box as needed, greatly improving the flexibility and efficiency of construction.

[0004] High-current plug-in boxes employ an integrated structure. In this structure, copper busbars are welded to the busbar sockets and then bolted to the incoming terminals of the circuit breaker inside the box. Because the busbar and plug-in box are integrated, they cannot be supplied separately; the production schedule of the plug-in box directly determines the delivery schedule. In actual production, the circuit breaker, as a critical component within the plug-in box, often has a long procurement cycle. This leads to a prolonged delivery time for the busbar, consequently affecting the overall installation schedule of the project. Once the installation schedule is disrupted, it not only increases project costs but may also affect the timely delivery and commissioning of the project.

[0005] Furthermore, most existing connectors are one-piece molded structures. This structure cannot effectively adjust to accommodate changes in busbar conductor specifications. The specifications of busbar conductors may vary in different engineering projects due to varying actual power requirements. Because of their fixed size and structure, one-piece molded connectors are difficult to match well with various busbar conductor specifications. This limits the application of busbar trunking and connector boxes in diverse engineering scenarios, reducing their applicability and versatility. Utility Model Content

[0006] The purpose of this utility model is to provide a floating, heavy-duty, detachable contact plug-in structure to solve the technical problems of connecting high-current plug-in boxes and busbar trunking, as well as the adaptability of the contact head to different specifications of busbar conductors.

[0007] To achieve the above objectives, the specific technical solution of this utility model for a floating, heavy-duty, detachable contact plug-in structure is as follows:

[0008] A floating, heavy-duty, detachable contact plug-in structure includes a plug-in box and a busbar trunking, as well as a connecting contact connecting the plug-in box and the busbar trunking;

[0009] The connecting contact includes a plurality of contact pieces corresponding to the busbar conductors in the busbar trough, and a connecting block connected to the plug box; the connecting block extends from the side wall of the plug box to both sides, with one end located inside the plug box and the other end connected to the busbar trough outside the plug 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;

[0010] 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 of the sidewall of the plug groove; when the first connection end is plugged into the busbar conductor, the connecting spring elastically abuts against the busbar conductor.

[0011] The insertion slot includes a first sidewall and a second sidewall located on both sides of the busbar conductor during insertion. The first sidewall is integral with the contact piece, and the second sidewall is detachably connected to the contact piece.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] As a further improvement of this utility model, there is a certain gap between the connecting protrusion and the connecting groove.

[0016] As a further improvement of this utility model, the second connecting end is bent in a stepped manner from both sides towards the middle.

[0017] As a further improvement of this utility model, the connecting spring is made of a conductive metal material with a certain elasticity, with both ends snapped into the spring groove, and one side protruding towards the busbar conductor.

[0018] 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.

[0019] As a further improvement of this utility model, the plug-in structure of this application also includes a power monitoring system, which 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.

[0020] 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.

[0021] Beneficial effects:

[0022] The connecting contact is connected to the plug-in box via a connecting block, and the contact piece passes through the connecting slot of the connecting block to connect to the busbar conductor in the busbar trunking, breaking the limitations of the traditional integrated structure of high-current plug-in boxes and busbars. This design allows the plug-in box and busbar trunking to be supplied completely separately. The busbar trunking can be produced and shipped independently without waiting for the plug-in box to be completed, completely solving the problem of long busbar delivery time and impact on project installation progress caused by long circuit breaker procurement cycles. This ensures that the installation of the busbar trunk line can proceed as planned and significantly improves project construction efficiency.

[0023] The contact piece is assembled with the connecting block via a connecting groove, and the second sidewall of the plug groove is detachably connected to the contact piece. The size of the plug groove can be flexibly adjusted by replacing different specifications of the second sidewall, easily adapting to different specifications of busbar conductors. Compared with the disadvantages of traditional one-piece molded plugs that cannot be adjusted, this structure greatly improves the adaptability to diverse busbar conductors, reduces the need for customized special parts due to differences in busbar specifications, and lowers production costs and adaptation difficulty.

[0024] A connecting spring is provided in the insertion slot of the first connection end of the contact piece. When the busbar conductor is inserted, the connecting spring elastically abuts against the busbar conductor, which can effectively compensate for assembly errors, ensure that the two are always in close contact, reduce contact resistance, reduce the risk of overheating, and ensure stable and safe power transmission. At the same time, this elastic abutment structure provides a certain buffer for the connection, which can cope with slight vibrations or displacements, further enhancing the reliability of the connection.

[0025] In summary, the structural design of this application balances connection precision and ease of operation. The contact piece is positioned to correspond to the busbar conductor and precisely engages with the connecting block via a connecting groove, ensuring accurate mating with the busbar conductor. The structure of the connecting block extending from the side wall of the plug-in box, along with the detachable assembly method of the contact piece and the connecting block, facilitates subsequent installation, maintenance, and component replacement, reducing maintenance costs and operational complexity. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a floating, heavy-duty, detachable contact plug-in structure according to the present invention.

[0027] Figure 2 This is a schematic diagram of the plug-in box and busbar trunking.

[0028] Figure 3 This is a schematic diagram of the contact head structure;

[0029] Figure 4 This is a schematic diagram of the contact patch structure;

[0030] The markings in the diagram are as follows: 1. Plug-in box; 2. Busbar trunking; 21. Busbar conductor; 22. Connection port; 23. Positioning groove; 3. Connecting contact; 31. Contact piece; 311. First connection end; 3111. Plug-in groove; 3112. Spring slot; 3113. First side wall; 3114. Second side wall; 312. Second connection end; 313. Connecting protrusion; 32. Connecting block; 321. Connecting groove; 3211. Connecting recess; 322. Connecting strip; 3221. Connecting hole. Detailed Implementation

[0031] 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.

[0032] Implementation example:

[0033] like Figure 1 and 2As shown, a floating, heavy-duty, detachable contact plug-in structure includes a separately configured plug-in box 1 and a busbar trunking 2. The plug-in box 1, as a key carrier for power distribution, integrates load-side conductive components and undertakes the function of distributing power from the busbar trunking 1 to the electrical equipment, while also providing installation and protection space for the connecting contacts. The busbar trunking 2, as the main channel for current transmission, contains busbar conductors for transmitting large currents. Its overall structure is enclosed or semi-enclosed to ensure the stability and safety of power transmission, and also provides an interface for connection with the plug-in box 1. A connection port is provided on the upper surface of the busbar trunking 2, exposing the internal busbar conductors 21. The connecting contacts 3 enter the busbar trunking 2 through the connection port 22 to connect with the busbar conductors 21. A positioning protrusion (not shown in the figure) is provided at the bottom of the plug-in box 1, and a corresponding positioning groove 23 is provided on the upper surface of the busbar trunking 2. During installation, the positioning protrusion enters the positioning groove 23, and the plug-in box 1 and the busbar trunking 2 are fixedly connected by welding.

[0034] The connecting contact 3 is the core component for achieving electrical connection between the plug-in box 1 and the busbar trough 2, and includes contact pieces 31 and connecting blocks 32. In this embodiment, the number of contact pieces 31 corresponds to five busbar conductors 21, responsible for transmitting current from the busbar conductors 21 to the load side. The connecting blocks 32 serve a fixing and guiding function, connecting the contact pieces 31 to the plug-in box 1 and ensuring precise alignment between the contact pieces 31 and the busbar conductors 21. The connecting block 32 passes through the bottom surface of the plug-in box 1, with one end protruding from the bottom surface and the other end connecting to the busbar trough 2. A connecting strip 322 is provided on the outer surface of the connecting block 322, and bolts pass through the connecting holes 3221 on the connecting strip 322 to fix the connecting block 32 to the bottom surface of the plug-in box 1. The connecting block 32 has five connecting slots 321 running from top to bottom, through which the contact pieces 31 pass into the busbar trough 1 and connect to the busbar conductors 21.

[0035] like Figure 3 and 4As shown, the contact piece 31 is made of T2 copper through a split milling process and then silver-plated. It includes a first connecting end 311 and a second connecting end 312. The second connecting end 312 is bent in a stepped shape from both sides of the connecting block 32 towards the middle. The bent part is a terminal block, which is detachably connected to the conductive component on the load side by bolts. The lower end of the first connecting end 311 is a dovetail-shaped insertion groove 3111. The concave opening of the insertion groove 3111 is used to insert the busbar conductor 21. The inner wall of the insertion groove 3111 is provided with a spring slot 3112 facing each other. A connecting spring is provided in the spring slot 3112. The connecting spring protrudes and clamps the busbar conductor 21. The connecting spring is a flexible copper sheet of this application. One side is arc-shaped and protrudes smoothly into the spring slot 3112 on both sides. The elastic deformation characteristics of the connecting spring can further compensate for dimensional deviations and ensure contact reliability. The plug slot 3111 has a first sidewall 3113 and a second sidewall 3114 on its two sides. The first sidewall 3113 is integrally formed with the contact piece 31, and the second sidewall 3114 is fixed to the contact piece 31 by screws, and cooperates with the first sidewall 3113 to clamp the busbar conductor 21. When the specifications of the busbar conductor 21 (such as thickness and width) change, the internal space of the plug slot 3111 can be adjusted by replacing the second sidewall 3114 of the corresponding size, so that the contact piece 31 can be stably fitted on the outside of the busbar conductor 21 of different specifications.

[0036] The contact piece 31 has connecting protrusions 313 protruding to both sides in the middle. A corresponding connecting groove 3211 of matching size is provided within the connecting groove 321. The connecting protrusions 313 enter the connecting grooves 3211 to complete the installation of the contact piece 31 within the connecting groove 321. A certain gap exists between the connecting protrusions 313 and the connecting grooves 3211, allowing the contact piece 31 to move slightly along the connecting groove within a certain range. This floating characteristic can compensate for alignment errors during installation or accommodate minor deformations of the busbar conductor 21 caused by temperature changes, avoiding contact loosening caused by rigid connections. Furthermore, the elastic abutment of the connecting spring ensures that the contact piece 31 remains tightly fitted to the busbar conductor 21, reducing contact resistance and minimizing the risk of overheating.

[0037] 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 31 and the busbar conductor 21, and a controller electrically connected to the current sensor and temperature sensor. The controller receives and processes data collected by the sensors regarding the power intake of the plug-in box 1 and the busbar trunking 2, and uses set thresholds and intelligent algorithms to achieve 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.

[0038] In summary, this utility model achieves the separation of the plug-in box 1 and the busbar trunking 2, allowing them to be produced and supplied independently. The busbar trunking 2 can be produced and shipped in advance according to project requirements, avoiding constraints from the circuit breaker procurement cycle, ensuring project installation progress, and significantly improving construction flexibility. The second sidewall 3114 of the contact piece plug-in slot is detachable. By replacing different specifications of the second sidewall 3114, the size of the plug-in slot 3111 can be adjusted. Combined with the elastic compensation of the connecting spring, it can stably adapt to various specifications of busbar conductors 21, enhancing the versatility and applicability of the structure. The contact piece 31 and the connecting block 32 cooperate through the connecting groove 321 with a gap, allowing the contact piece to float within a small range, compensating for installation errors and busbar deformation. Simultaneously, the connecting spring elastically abuts against the busbar conductor 21, ensuring constant tight contact, reducing contact resistance and the risk of overheating, and improving power transmission stability.

[0039] 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 floating heavy duty detachable contact plug structure, characterized in that, It includes a plug-in box and a busbar trunking, as well as connecting contacts that connect the plug-in box and the busbar trunking; The connecting contact includes a plurality of contact pieces corresponding to the busbar conductors in the busbar trough, and a connecting block connected to the plug box; the connecting block extends from the side wall of the plug box to both sides, with one end located inside the plug box and the other end connected to the busbar trough outside the plug 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 of the sidewall of the plug groove; when the first connection end is plugged into the busbar conductor, the connecting spring elastically abuts against the busbar conductor. The insertion slot includes a first sidewall and a second sidewall located on both sides of the busbar conductor during insertion. The first sidewall is integral with the contact piece, and the second sidewall is detachably connected to the contact piece.

2. The floating heavy-duty removable contact plug structure according to claim 1, wherein, 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 floating heavy-duty removable contact plug structure of claim 2, wherein, 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 floating, heavy-duty, detachable contact, plug structure of claim 1, wherein, 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 floating, heavy-duty, detachable contact plug structure according to claim 4, characterized in that There is a certain gap between the connecting protrusion and the connecting groove.

6. The floating, heavy-duty, detachable contact, plug structure of claim 1, wherein, The second connecting end bends in a stepped manner from both sides toward the middle.

7. The floating, heavy-duty, detachable contact plug structure according to claim 1, wherein, The connecting spring is made of a conductive metal material with a certain degree of elasticity. Both ends are snapped into the spring slot, and one side protrudes towards the busbar conductor.

8. The floating, heavy-duty, detachable contact, plug structure of claim 1, wherein, 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 floating, heavy-duty, detachable contact, plug structure of claim 1, wherein, 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 floating, heavy-duty, detachable contact, plug structure of claim 1, wherein, 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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