Tubular busbar connection structure

Abstract

The utility model discloses a tubular bus connecting structure, its characterized in that, including: tubular bus structure body, the inside circle hollow portion of tubular bus structure body is provided with eccentric inner rib along the eccentric position of diameter, the inside circle hollow portion both sides of tubular bus structure body are divided into first air duct and second air duct by eccentric inner rib, the bus outer contact surface of connecting is made in the centre of circle car of one end of tubular bus structure body, the end of the bus outer contact surface is extended and is provided with a plurality of bus inner rib fastening holes by eccentric inner rib, and the tubular bus structure body is locked through two fastening hoops and fastener cooperation after through inner rib misplacement symmetrical cooperation. The utility model is used to satisfy the connecting structure of tubular bus, realizes the reliable contact of conductor, heat dissipation, electric field is good, can also reduce the material consumption. Solve the problem that tubular bus connection can not be considered simultaneously with heat dissipation, electric field.

Description

Technical Field

[0001] This utility model relates to the field of industrial electrical cabinets, specifically to a tubular busbar connection structure. Background Technology

[0002] Currently, the mainstream tubular busbars are divided into two or more circular composite conductors (such as D-type busbars); small-diameter hollow conductors (approximately below 30mm); and large-diameter hollow conductors (approximately ≥30mm).

[0003] Two or more circular conductors are used, with the overlapping surface achieved by the plane of the semi-circular or circular partial structure, the arc surface for electric field optimization, and the hollow part for airflow. This structure is difficult to connect, and often involves inserting a rectangular bar into two clamping D-shaped bars and tapping them together. The electric field is disrupted at the joint, and the rectangular bar cannot form an airflow with the D-shaped bar, making it unsuitable for miniaturized, high-current, or high-electric-field applications.

[0004] Small-diameter hollow conductors (below 30mm) are often connected by forging flat surfaces at the ends. A shield is added at the connection to optimize the electric field. The hollow air duct is usually sealed after forging. This type is often used in applications with low current and low requirements for electric field.

[0005] Large-diameter hollow conductors (approximately ≥30mm) are often connected using circumferential clamps, single-sided tightening, and end-welded connectors. Shielding covers are used to optimize the electric field in areas with poor electric field performance. The connecting rows are mostly rectangular, making it difficult to maintain a continuous hollow air duct. Another method uses watch strap contacts for transitional connections, resulting in a good electric field and continuous channels, but these are mostly straight lines, making it difficult to achieve bends in small spaces, and the cost is relatively high.

[0006] Most common tubular busbars on the market are made of outer and inner circles of different diameters (as opposed to different wall thicknesses), and few have internal ribs in the hollow part of the inner circle. Utility Model Content

[0007] In order to overcome the above-mentioned defects of the prior art, the purpose of this utility model is to provide a tubular busbar connection structure.

[0008] This invention provides a connection structure for tubular busbars that achieves reliable conductor contact, heat dissipation, and a good electric field, while also reducing material usage. It solves the problem that tubular busbar connections cannot simultaneously achieve both heat dissipation and a good electric field.

[0009] To achieve the purpose of this utility model, the technical solution adopted is as follows:

[0010] A tubular busbar connection structure, comprising:

[0011] The tubular busbar structure body has an eccentric inner rib eccentrically arranged along the diameter of the hollow inner circle portion of the tubular busbar structure body. The eccentric inner rib divides the two sides of the hollow inner circle portion of the tubular busbar structure body into a first air duct and a second air duct.

[0012] At one end of the tubular busbar structure body, a busbar outer contact surface for connection is machined with a center. The eccentric inner rib extends out of the end of the busbar outer contact surface and is provided with a plurality of busbar inner rib fastening holes.

[0013] The tubular busbar structures are fitted together by symmetrical internal reinforcement and then locked in place by two fastening clamps and fasteners.

[0014] In a preferred embodiment of the present invention, the fastening clamp is a semi-circular fastening clamp.

[0015] In a preferred embodiment of the present invention, the semi-circular fastening clamp is a bolt lock or a wire threaded sleeve.

[0016] In a preferred embodiment of the present invention, a fastening hoop boss is provided inside the semi-circular fastening hoop, and inner contact surfaces are provided at both ends of the semi-circular fastening hoop.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model's tubular busbar connection structure allows for adjustable fastening direction, bend connections, and branch connections, meeting the needs of applications requiring small space installation, high current, high heat dissipation, and optimized electric field. Utilizing a circular structure, the rotating inner ribs oriented in different directions allow for adjustable fastening positions, overcoming spatial limitations. The overlapping method of the inner ribs and the shape of the fastening clamp enable angle conversion of the tubular busbar overlap. The overlapping of the inner ribs, the outer contact surface of the tubular busbar, and the fastening clamp boss increase the contact area, solving the problem of high current carrying capacity. The rectangular or circular slots on the fastening clamp bosses, connected to the hollow portion of the tubular busbar, ensure airflow continuity and improve heat dissipation. The tubular arc shape optimizes electric field performance.

[0019] The tubular busbar of this invention has a mature manufacturing process, is simple to process, and is easy to install due to dimensional matching. After assembly, it has advantages such as good current carrying capacity, fast heat dissipation, and good electric field. The disadvantages are: the manufacturing cost is relatively higher than that of rectangular busbars, and the fastening clamps require mold opening and additional processing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0023] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 4 .

[0024] Figure 5 This is a schematic diagram of the structure of the present invention. Figure 5 .

[0025] Figure 6 This is a schematic diagram of the structure of the present invention. Figure 6 .

[0026] Figure 7 This is a schematic diagram of the structure of the present invention. Figure 7 .

[0027] Figure 8 This is a schematic diagram of the use of this utility model. Figure 1 (Schematic diagram of the "bent type" tubular busbar connection structure).

[0028] Figure 9 This is a schematic diagram of the use of this utility model. Figure 2 (Schematic diagram of the "T-type" tubular busbar connection structure).

[0029] Figure 10 This is a schematic diagram of the use of this utility model. Figure 3 (Schematic diagram of the "cross-shaped" tubular busbar connection structure). Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, in the following descriptions, well-known structures and technologies have been omitted to avoid unnecessary confusion regarding the concept of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Conventional cylindrical busbars offer high strength and good current carrying capacity, but they also have drawbacks in manufacturing and practical applications: they are difficult to bend, limited by the skin effect, and suffer from significant material waste and poor heat dissipation under high-current conditions. Currently available tubular busbars also lack a connection method that combines superior performance in multiple aspects, including manufacturing, current carrying capacity, electric field, airflow, bending, and branching.

[0033] Therefore, this utility model discloses a tubular busbar connection structure, including a tubular busbar structure body 1. The inner circular hollow part 3 of the tubular busbar structure body 1 is eccentrically provided with an eccentric inner rib 2 along the diameter position. The eccentric inner rib 2 divides the inner circular hollow part 3 of the tubular busbar structure body 1 into a first air duct 21 and a second air duct 22 on both sides.

[0034] At one end of the tubular busbar structure body 1, a busbar outer contact surface 5 for connection is machined in a circular pattern. An eccentric inner rib 2 extends beyond the end of the busbar outer contact surface 5 and is provided with several busbar inner rib fastening holes 6.

[0035] The tubular busbar structure body 1 is symmetrically fitted by the staggered inner ribs 2 and then locked by two semi-circular fastening clamps 7 and semi-circular fastening clamps 8 with fasteners 9.

[0036] Two tubular busbars are symmetrically staggered by internal ribs, allowing for surface-to-surface contact. (Similar to the installation method of rectangular busbars, but with the addition of copper or aluminum materials, it continues the connection advantages of rectangular busbars.) When the electric field requirements are not high, rectangular busbars or tubular busbars can be directly connected.

[0037] The angle of the eccentric inner rib can be adjusted by rotating the tubular generatrix, thus allowing for adjustable inclination angle of the lap joint.

[0038] Both the two semi-circular fastening clamps 7 and 8 are provided with fastening clamp bosses 11a and 11b inside.

[0039] The inner contact surfaces 10 of the two semi-circular fastening clamps 7 and 8 are used to connect with the outer contact surface 5 of the busbar when locking, increasing the contact surface of the conductor. The surfaces of both can be provided with an inclined angle or additional protrusions to improve the reliability of the contact and the current carrying area.

[0040] The fastening clamp bosses 11a and 11b are used to secure the eccentric inner rib 2 to ensure a reliable connection, and serve as gaskets and increase the conductive contact area. The fasteners 9, such as round-headed fastening bolts, are used to apply pressure to ensure reliable contact of the eccentric inner rib 2 busbar, thereby achieving the majority of current carrying capacity.

[0041] The semi-circular fastening clamp 7 (bolt locking) is used to install round-head fastening bolts. It is set with a platform and is embedded, and a bolt locking hole 13 is set at the fastening clamp protrusion 11a. After installation, the outer surface of the bolt is hidden in the semi-circular fastening clamp 7, so that the electric field is not severely damaged.

[0042] Another semi-circular fastening clamp 8 (steel wire threaded sleeve) has a fastening clamp boss 11b with a steel wire threaded sleeve mounting hole 12 for installing the steel wire threaded sleeve and improving the locking force.

[0043] The fastening clamp boss 11a and fastening clamp boss 11b are provided with rectangular or circular slots 111a and circular slots 111b to achieve the continuity of the air duct and improve the heat dissipation effect.

[0044] The semi-circular fastening clamp 7 (bolt locking) and the semi-circular fastening clamp 8 (steel wire thread sleeve) cover the outer side of the outer contact surface 5 of the busbar on the main body 1 of the tubular busbar structure. The outer surfaces of the three are almost overlapping, shielding the sharp edges of all components and optimizing the electric field.

[0045] The shape of the eccentric inner rib 2, the position of the busbar inner rib fastening hole 6, and the shape of the fastening clamp can change the connection angle of the tubular busbar to achieve multi-angle connection (bending type connection method).

[0046] The fastening clamps are matched with the same position and angle for fastening connection (T-type connection or non-90° connection) to realize the connection of branch busbars.

[0047] The tubular busbars and semi-circular fastening clamps are mainly made of highly conductive metals such as copper or aluminum.

[0048] Specifically, tubular busbars are mostly used in the main busbar position. Both ends are supported and fixed by cabinet bushings or insulators. The busbars of 2 to N cabinets can be connected by "straight" tubular busbars to extend the length of the busbars. The branch busbars can be connected by "T" tubular busbars (the conductor cross-section and current carrying capacity can be controlled by adjusting the wall thickness). The busbars of overhead incoming and outgoing lines can be connected by "cross" tubular busbars.

[0049] The above describes the basic principles, main features, and advantages of this utility model.

[0050] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of this utility model as defined by the appended claims and their equivalents.

Claims

1. A tubular busbar connection structure, characterized by, include: The tubular busbar structure body has an eccentric inner rib eccentrically arranged along the diameter of the hollow inner circle portion of the tubular busbar structure body. The eccentric inner rib divides the two sides of the hollow inner circle portion of the tubular busbar structure body into a first air duct and a second air duct. At one end of the tubular busbar structure body, a busbar outer contact surface for connection is machined with a center. The eccentric inner rib extends out of the end of the busbar outer contact surface and is provided with a plurality of busbar inner rib fastening holes. The tubular busbar structures are fitted together by symmetrical internal reinforcement and then locked in place by two fastening clamps and fasteners.

2. A tubular busbar connection structure according to claim 1, wherein The fastening clamp is a semi-circular fastening clamp.

3. A tubular busbar connection structure as claimed in claim 2, characterized in that The semi-circular fastening clamp is secured by bolts or wire threaded sleeves.

4. A tubular busbar connection structure according to claim 2, wherein The semi-circular fastening clamp has a fastening clamp boss inside, and inner contact surfaces are provided at both ends of the semi-circular fastening clamp.

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