A high current capacity dual plug bus connector and inflation tank

Abstract

This utility model discloses a high-current-capacity dual-plug busbar connector and an air-filled box, relating to the field of high-current connector technology. It includes a busbar connector with two ports for connecting to a busbar. Two sleeve connectors are provided on the side wall of the busbar connector, with the inner cavity of each sleeve connector communicating with the inner cavity of the busbar connector. A conductive tube is provided in the inner cavity of the busbar connector, and the connecting port of the busbar connector and the sleeve connectors is opposite to the side wall of the conductive tube. Each sleeve connector is used to connect to a power transmission bushing. The high-current-capacity dual-plug busbar connector provided in this application divides the large current transmitted by the busbar into multiple smaller currents, achieving the technical effect of transmitting a large current through a small-load power transmission bushing by splitting the current through multiple streams.

Description

Technical Field

[0001] This utility model relates to the field of high current connector technology, and in particular to a high current-carrying capacity double-plug bus connector and an air-filled box. Background Technology

[0002] With the development of the power industry, C-GIS gas-insulated switchgear, with its advantages of small size, compact structure, full insulation, and safe and reliable operation, has been widely used in large and medium-sized substations, industrial and mining projects, railways, wind power, and photovoltaic projects. Currently, most 35kV C-GIS gas-insulated switchgear on the market is rated at 2500A or below. Temperature rise and heat dissipation are technical challenges limiting the current carrying capacity of high-current gas-insulated switchgear with current ratings of 3150A, 4000A, and 5000A. Because the busbar connector is one of the important components of the gas-insulated switchgear, serving as a bridge connecting the various switchgear units, the current carrying capacity of the connector increases with the current rating, and existing connectors on the market cannot meet the current carrying requirements of 5000A or higher.

[0003] In summary, developing a bus connector capable of transmitting large currents through bushings with relatively small rated loads is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a high-current-capacity dual-plug busbar connector and an air-filled box, which solves the technical problem that the existing power transmission bushings have a small rated load and cannot transmit large currents.

[0005] To achieve the above objectives, this utility model provides a high current-carrying capacity dual-plug bus connector, comprising:

[0006] The busbar connector has two ports for connecting to the busbar. Several bushing connectors are provided on the side wall of the busbar connector. The inner cavity of each bushing connector is connected to the inner cavity of the busbar connector. The inner cavity of the busbar connector is provided with a conductive tube. The connecting port of the busbar connector and the bushing connector is opposite to the side wall of the conductive tube. Each bushing connector is used to connect to the power transmission bushing.

[0007] Preferably, each bushing connector is arranged perpendicularly to the busbar connector, the bushing connector passes through the busbar connector, and each bushing connector is symmetrically arranged on both sides of the axis of the busbar connector.

[0008] Preferably, both ends of the conductive tube are provided with mating grooves, and spring contacts for transmitting current are snapped into the mating grooves. The end of the spring contact away from the busbar plug-in tube end is fixed to the mating groove, and the spring contact can undergo axial deformation within the mating groove.

[0009] Preferably, the mating groove is interference-fitted with the busbar, and the end of the busbar can extend into the mating groove and abut against the spring contact finger.

[0010] Preferably, the conductive tube has several connection holes on its side wall, each connection hole corresponding to the communication port of the busbar connector and the sleeve connector. The connection holes are symmetrically distributed on both sides of the axis of the conductive tube, and the two connection holes located in the same sleeve connector are used to install locking components.

[0011] Preferably, the inner diameters at both ends of the bushing connector gradually decrease towards the axis of the busbar connector, and an abutment ring extends from the port where the bushing connector connects to the busbar connector, with the abutment ring extending towards the axis of the bushing connector.

[0012] Preferably, the locking component includes a locking nut and a locking bolt. Tightening the locking nut causes the heads of the locking nut and the locking bolt to clamp and abut against the ring platform. The locking component is used to lock the position of the busbar connector and the conductive pipe.

[0013] Preferably, both the busbar connector and the bushing connector are made of insulating material.

[0014] Preferably, there are two bushing connectors, and the rated current of the busbar is twice that of the transmission bushing.

[0015] An air-filled box includes the aforementioned high-current-capacity dual-plug bus connector.

[0016] Compared to the aforementioned background technology, the high current-carrying capacity dual-plug bus connector provided in this application includes: a bus connector tube, with a busbar passing through the ports on both sides of the bus connector tube, a conductive tube provided in the inner cavity of the bus connector tube, both ends of the conductive tube being able to connect with the busbar, and a plurality of sleeve connector tubes provided on the side wall of the bus connector tube, the sleeve connector tubes being used to connect with the power transmission sleeves, the inner cavity of the sleeve connector tubes being connected to the inner cavity of the bus connector tubes, and the ports of the two connecting are corresponding to the side wall of the conductive tubes. When this application is installed on the inflation box and current is passed through it, the busbars extend into both ends of the bus connector tubes and abut against the ends of the conductive tubes, the current transmitted by the busbars is conducted to the conductive tubes, and at the same time, the power transmission tubes of the inflation box connect with the sleeve connector tubes, the power transmission sleeves extend into the bus connector tubes through the sleeve connector tubes and abut against the side wall of the conductive tubes, the number of sleeve connector tubes being several, the current in the conductive tubes being divided into several strands, which are respectively input into the inflation box through each power transmission sleeve.

[0017] This application provides a method to divert the large current transmitted in the busbar into a small current that can be transmitted by the small load transmission bushing by setting a conductive pipe inside the busbar plug pipe and setting a number of bushing plug pipes connected to the conductive pipe on its side wall, so that the small currents converge with the gas-filled box, thereby achieving the technical effect of transmitting a large current through a small load transmission bushing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 A cross-sectional view of the high current-carrying capacity dual-plug bus connector provided in an embodiment of this utility model;

[0020] Figure 2 A side view of the high current-carrying capacity dual-plug bus connector provided in an embodiment of this utility model;

[0021] Figure 3 This is an assembly diagram of the high-current-capacity dual-plug bus connector and the air-filled box provided in this embodiment of the utility model.

[0022] Among them, 1-busbar connector; 2-sleeve connector; 21-abutment ring platform; 3-conductive pipe; 4-spring contact finger; 5-connection hole; 6-transmission bushing. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] This application provides a high-current-capacity dual-plug bus connector; please refer to the attached specification. Figures 1 to 3This utility model includes a busbar connector 1, with its two ends for connecting to a busbar for transmitting current. A conductive tube 3 is provided inside the busbar connector 1, coaxially arranged with the busbar connector 1. Both ends of the conductive tube 3 can connect to the busbar. Several sleeve connectors 2 are provided on the side wall of the busbar connector 1, for connecting to a transmission sleeve 6. The inner cavity of the sleeve connector 2 communicates with the inner cavity of the busbar connector 1, and the connecting ports of the sleeve connector 2 and the busbar connector 1 correspond to the side wall of the conductive tube 3. It is said that after the power transmission sleeve 6 on the inflation box is connected to the sleeve plug 2, the power transmission sleeve 6 abuts against the side wall of the conductive pipe 3. In one embodiment of this application, the bus plug 1 is connected to the bus of the input current, and each power transmission sleeve 6 extends into the sleeve plug 2. At this time, both the bus and the power transmission sleeve 6 abut against the conductive pipe 3. After each power transmission sleeve 6 is connected in parallel, it is connected in series with the bus through the conductive pipe 3. The current input from the bus is divided into several branches and output from the power transmission sleeve 6 to the inflation box. Each branch converges in the inflation box to maintain the operation of the inflation box.

[0026] Please continue to refer to the instruction manual appendix. Figure 1 Each bushing connector 2 is perpendicular to the busbar connector 1. Preferably, each bushing connector 2 passes through the busbar connector 1, and both ends of each bushing connector 2 extend to both sides of the axis of the busbar connector 1. The same bushing connector 2 is symmetrical about the axis of the busbar connector 1, that is, the busbar connector 1 can be connected to an air-filled box on both sides. The transmission bushing 6 on each air-filled box can be inserted into the inner cavity of the busbar connector 1 through the bushing connector 2, so that both sides of the axis of the conductive pipe 3 are abutted by the transmission bushing 6. This application enables the transmission bushing 6 with a small load to transmit a large current, and also enables the busbar to connect more air-filled boxes, thus improving the applicability of this application.

[0027] Furthermore, both ends of the conductive tube 3 are provided with mating grooves, each mating groove being coaxially arranged with the conductive tube 3. Each mating groove is provided with a spring contact finger 4. Preferably, the end of each spring contact finger 4 facing away from the busbar connector 1 is fixedly connected to the side wall of the mating groove, while the other end of each spring contact finger 4 can deform axially within the mating groove. Under no external force, the length of the spring contact finger 4 is equal to the depth of the mating groove. In addition, the diameter of the busbar is slightly larger than the diameter of the busbar connector 1. After the busbar and the busbar connector 1 are mated, they are interference-fitted to ensure a stable connection of the busbar. Preferably, the end of the busbar is coaxially provided with a tapered section. After the operator inserts the busbar into the busbar connector 1, the tapered section extends into the inner cavity of the mating groove, that is, the tapered section continuously compresses the spring contact finger 4. The spring contact finger 4 is specifically made of conductive material. When the busbar is inserted to a certain depth, the spring contact finger 4 is tightly fitted with the end of the busbar, and the input current of the busbar can be stably transmitted to the spring contact finger 4, and then transmitted to the conductive tube 3 by the spring contact finger 4.

[0028] Please refer to the instruction manual appendix. Figure 2 Several connecting holes 5 are provided on the side wall of the conductive tube 3. The connecting holes 5 are symmetrically distributed on both sides of the axis of the conductive tube 3. Preferably, the connecting holes 5 on both sides of the axis of the conductive tube 3 are in pairs, and the line connecting the connecting holes 5 in the same group is perpendicular to the axis of the conductive tube 3. Each group of connecting holes 5 corresponds to the communication port of each sleeve insertion pipe 2 and busbar insertion pipe 1. Preferably, the inner radial direction of both ends of each sleeve insertion pipe 2 gradually tapers towards the axis of the conductive tube 3, so that the inner walls on both sides of the sleeve insertion pipe 2 are conical. When the sleeve insertion pipe 2 with this structure is connected to the transmission sleeve 6, the stress between the two increases as it gradually extends. After the connection is completed, it can ensure that the sleeve insertion pipe 2 can fit tightly with the transmission sleeve 6, so that the conductive tube 3 and the transmission sleeve 6 can stably transmit current. In addition, an abutment ring 21 extends from the tapered end of each sleeve insertion pipe 2, and a locking element is inserted in each group of connecting holes 5. Preferably The locking components include a locking bolt and a locking nut. The diameter of the threaded rod of the locking bolt is smaller than the diameter of the connecting hole 5, and the diameter of the head of the locking bolt and the locking nut is larger than the inner ring diameter of the abutment ring 21. That is, after the locking bolt is inserted into a set of connecting holes 5, the head of the locking bolt abuts against the top of the abutment ring 21. The length of the locking bolt is greater than the diameter of the busbar connector 1. The tail of the locking bolt extends out from the connecting hole 5 on the other side. The locking nut is screwed on the tail of the bolt, and the locking nut gradually fits against the abutment ring 21 on that side. The locking bolt and the locking nut tightly clamp the busbar connector 1, locking the position of the conductive tube 3 and the busbar connector 1. Furthermore, the length of the locking bolt can be further extended so that the locking bolt extends out from the port of the sleeve connector 2. The tail of the locking bolt can be connected to the transmission sleeve 6 to ensure that the current of the conductive tube 3 is stably transmitted to the gas filling box.

[0029] Preferably, both the busbar connector 1 and the bushing connector 2 are made of insulating material. There are two bushing connectors 2. The rated current of the busbar is twice that of the transmission bushing 6. This application provides a method to divert the large current transmitted in the busbar into a smaller current that can be transmitted by the smaller transmission bushing 6 by setting a conductive pipe 3 inside the busbar connector 1 and setting a plurality of bushing connectors 2 connected to the conductive pipe 3 on its side wall. This allows the small currents to converge with the gas-filled box, achieving the technical effect of transmitting a large current through a small-load transmission bushing 6.

[0030] This application also provides an air box equipped with the aforementioned high-current-capacity dual-plug bus connector. The specific structure and function of the air box are publicly available technologies and will not be described in detail here.

[0031] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0032] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A high current-carrying capacity dual-plug bus connector, characterized in that, include: Busbar connector (1), the two sides of the busbar connector (1) are used to connect the busbar, the side wall of the busbar connector (1) is provided with a plurality of sleeve connectors (2), the inner cavity of each sleeve connector (2) is connected to the inner cavity of the busbar connector (1), the inner cavity of the busbar connector (1) is provided with a conductive tube (3), the connecting port of the busbar connector (1) and the sleeve connector (2) is opposite to the side wall of the conductive tube (3), and each sleeve connector (2) is used to connect the power transmission sleeve (6).

2. The high current-carrying capacity dual-plug bus connector according to claim 1, characterized in that, Each of the bushing connectors (2) is arranged perpendicularly to the busbar connector (1), and the bushing connectors (2) penetrate the busbar connector (1). Each of the bushing connectors (2) is arranged symmetrically on both sides of the axis of the busbar connector (1).

3. The high current-carrying capacity dual-plug bus connector according to claim 2, characterized in that, Both ends of the conductive tube (3) are provided with docking grooves. A spring contact finger (4) for transmitting current is snapped into the docking groove. The end of the spring contact finger (4) away from the port of the busbar plug tube (1) is fixed to the docking groove. The spring contact finger (4) can undergo axial deformation in the docking groove.

4. The high current-carrying capacity dual-plug bus connector according to claim 3, characterized in that, The mating groove is interference-fitted with the busbar, and the end of the busbar can extend into the mating groove and abut against the spring contact finger (4).

5. The high current-carrying capacity dual-plug bus connector according to claim 2, characterized in that, The conductive tube (3) has several connection holes (5) on its side wall. Each connection hole (5) corresponds to the communication port of the busbar connector (1) and the sleeve connector (2). Each connection hole (5) is symmetrically distributed on both sides of the axis of the conductive tube (3). Two connection holes (5) located in the same sleeve connector (2) are used to insert locking components.

6. The high current-carrying capacity dual-plug bus connector according to claim 5, characterized in that, The inner diameters at both ends of the bushing connector (2) gradually decrease towards the axis of the busbar connector (1), and an abutment ring (21) extends from the port where the bushing connector (2) communicates with the busbar connector (1), and the abutment ring (21) extends towards the axis of the bushing connector (2).

7. The high current-carrying capacity dual-plug bus connector according to claim 6, characterized in that, The locking component includes a locking nut and a locking bolt. Tightening the locking nut causes the heads of the locking nut and the locking bolt to clamp the abutment ring (21). The locking component is used to lock the positions of the busbar connector (1) and the conductive tube (3).

8. The high current-carrying capacity dual-plug bus connector according to claim 6, characterized in that, Both the busbar connector (1) and the bushing connector (2) are made of insulating material.

9. The high current-carrying capacity dual-plug bus connector according to claim 1, characterized in that, Specifically, there are two bushing connectors (2), and the rated current of the busbar is twice that of the transmission bushing (6).

10. An inflatable box, characterized in that, Including the high current-capacity dual-plug bus connector as described in any one of claims 1 to 9.

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