Bus clamp for power transmission and distribution equipment

Abstract

The utility model relates to power transmission and transformation equipment technical field, the utility model discloses a bus clamp of power transmission and transformation equipment, including equipment connection module and bus connection module, equipment connection module includes ball head connecting rod and lock nut of screw connection on ball head connecting rod, bus connection module includes conductive transition block, pressing plate and connecting unit. The utility model has the following advantages: the utility model is through the ball head connecting rod of equipment connection module and equipment terminal connection, and the conductive transition block of bus connection module and the ball head cooperation of the other end of ball head connecting rod, constitutes a double ball head structure, makes bus clamp in equipment end and bus end all have the rotation adjusting ability in the rotation of a certain angle in all directions, can effectively compensate the installation error, misplacement between equipment terminal and bus and the displacement caused by thermal expansion and contraction in operation, eliminates mechanical stress, ensures reliable connection.

Description

Technical Field

[0001] This utility model relates to the field of power transmission and transformation equipment technology, specifically to a busbar clamp for power transmission and transformation equipment. Background Technology

[0002] In power transmission and transformation systems, busbar clamps are key hardware used to connect power equipment terminals to busbars and ensure reliable power transmission. Traditional busbar clamp structures often use a rigid connection method with a fixed angle, which has poor installation adaptability and is difficult to compensate for displacement deviations between equipment terminals and busbars caused by installation errors or thermal expansion and contraction. This can easily lead to mechanical stress at the connection point, affecting contact reliability. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a busbar clamp for power transmission and transformation equipment, which has multi-directional adjustment capabilities and can improve the reliability and safety of power transmission and transformation equipment connections.

[0004] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a busbar clamp for power transmission and transformation equipment, comprising: an equipment connection module, the equipment connection module including a ball-head connecting rod and a locking nut threadedly connected to the ball-head connecting rod, one end of the ball-head connecting rod being used to cooperate with a connection hole on the equipment terminal and being locked and fixed by the locking nut; a busbar connection module, the busbar connection module including a conductive transition block cooperating with the other end of the ball-head connecting rod, a pressure plate and a connection unit, the top surface of the conductive transition block and the bottom surface of the pressure plate both having T-shaped grooves arranged opposite to each other, the pressure plate having a through hole communicating with the T-shaped groove, the connection unit including a connecting bolt slidably disposed in the T-shaped groove in the conductive transition block and the connecting bolt threadedly connected to a fixing nut located above the pressure plate through the through hole.

[0005] Preferably, the conductive transition block includes a copper plate and an aluminum plate laminated on the copper plate, the bottom surface of the copper plate has a ball socket that mates with the ball head of the ball head connecting rod, and the aluminum plate has the T-shaped groove.

[0006] Preferably, the surfaces of the pressure plate and the conductive transition block that contact the busbar are arc surfaces and have a mesh pattern on the arc surface.

[0007] Preferably, an elastic corrugated washer is fitted on the connecting bolt between the pressure plate and the fixing nut.

[0008] Preferably, the side of the pressure plate is coated with a high-temperature reversible color-changing coating.

[0009] With the above structure, this utility model has the following advantages:

[0010] This utility model connects the ball-head connecting rod of the equipment connection module to the equipment terminal, and the conductive transition block of the busbar connection module cooperates with the ball head at the other end of the ball-head connecting rod to form a double ball-head structure. This allows the busbar to have multi-directional rotation adjustment capability within a certain angle at both the equipment end and the busbar end. It can effectively compensate for installation errors, misalignments, and displacements caused by thermal expansion and contraction during operation between the equipment terminal and the busbar, eliminate mechanical stress, and ensure reliable connection.

[0011] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is the front view of this utility model.

[0015] Figure 3 This is the left view of this utility model.

[0016] Figure 4 This is a schematic diagram of the exploded state of this utility model.

[0017] As shown in the figure: 1. Ball joint connecting rod; 2. Locking nut; 3. Copper plate; 4. Aluminum plate; 5. Pressure plate; 6. T-shaped groove; 7. Arc surface; 8. Elastic wave washer; 9. Connecting bolt; 10. Fixing nut. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] Combined with appendix Figures 1-4 A busbar clamp for power transmission and transformation equipment, comprising an equipment connection module and a busbar connection module.

[0021] The equipment connection module includes a ball-head connecting rod 1 and a locking nut 2 threaded onto the ball-head connecting rod 1. One end of the ball-head connecting rod 1 is used to mate with the connection hole on the equipment terminal and is locked and fixed by the locking nut 2. The busbar connection module includes a conductive transition block that mates with the ball-head connecting rod 1 at the other end, a pressure plate 5, and a connection unit. The top surface of the conductive transition block and the bottom surface of the pressure plate 5 are both provided with T-shaped grooves 6 that are arranged opposite to each other. The pressure plate 5 is provided with a through hole that communicates with the T-shaped groove 6. The connection unit includes a connecting bolt 9 that is slidably disposed in the T-shaped groove 6 in the conductive transition block. The connecting bolt 9 is threaded through the through hole and connected to a fixing nut 10 located above the pressure plate. The head of the connecting bolt 9 is a square block structure that is clearance-fitted with the side wall of the T-shaped groove 6, so that the connecting bolt 9 can slide linearly along the T-shaped groove 6 and cannot rotate circumferentially.

[0022] In one embodiment of this utility model, the conductive transition block includes a copper plate 3 and an aluminum plate 4 laminated on the copper plate 3. The bottom surface of the copper plate 3 has a recess that mates with the ball head of the ball-joint connecting rod 1, and the aluminum plate 4 has a T-shaped groove 6. Specifically, as shown... Figure 1 As shown, the copper-aluminum composite structure makes the bottom of the conductive transition block near the equipment side copper, achieving a same-metal connection with the ball-head connecting rod 1, which is usually made of copper, thus avoiding electrochemical corrosion. The aluminum part at the top is used to clamp the aluminum busbar, also achieving a same-metal connection. This eliminates the corrosion and high contact resistance problems caused by direct contact between dissimilar metals such as copper and aluminum, significantly improving the long-term stability and electrical performance of the connection. The cooperation between the ball socket and the ball head provides a stable support point and a certain degree of freedom for adjustment for the entire busbar connection module.

[0023] In one embodiment of this utility model, the surfaces of the pressure plate 5 and the conductive transition block that contact the busbar are arc surfaces 7, and the arc surfaces 7 are provided with a mesh pattern. Specifically, as shown... Figure 1 and Figure 3As shown, the arc surface 7 is designed to match the outer curved surface of common rectangular or circular busbars, which can increase the effective contact area and ensure uniform distribution of clamping force. The finely machined mesh texture is a microstructure that can scratch the oxide layer on the surface of the busbar during the fastening process, reduce the contact resistance, increase the friction coefficient, and prevent the busbar from sliding or loosening under vibration. The grooves between the textures can accommodate a certain amount of deformation, making the contact tighter.

[0024] In one embodiment of this utility model, an elastic corrugated washer 8 is fitted on the connecting bolt 9 between the pressure plate 5 and the fixing nut 10. Specifically, as shown... Figures 3-4 As shown, the elastic corrugated washer 8 is composed of one or more corrugated metal washers stacked together, which can provide continuous and stable elastic pressure. When the fixing nut 10 is tightened, the corrugated washer is flattened and stores elastic potential energy. During long-term operation, if the clamping force decreases due to creep, vibration or temperature changes of the busbar or connector itself, the elastic potential energy stored in the corrugated washer will be released to automatically compensate for the relaxation, so that the contact pressure is always maintained at a high and stable level, effectively preventing the heating problem caused by the decrease in contact pressure.

[0025] In one embodiment of this utility model, the side of the pressure plate 5 is coated with a high-temperature reversible color-changing coating. Specifically, the coating can be formulated from a temperature-sensitive compound, such as mercuric iodide or copper iodide double salt, which can provide an intuitive overheat warning. When the bus clamp causes abnormal heating due to excessive contact resistance caused by loose connection, corrosion, or other reasons, and exceeds the specified critical temperature of the coating, such as 70°C or 80°C, the coating color will change from the initial color at room temperature, such as red, to another color, such as white or yellow. This color change is reversible, and the color will return when the temperature drops. This makes it easier for maintenance personnel to discover potential fault points remotely during line inspections and to handle them in a timely manner, realizing condition-based maintenance and greatly improving the safety of equipment operation.

[0026] In summary, the working principle of the busbar clamp of the power transmission and transformation equipment described in this utility model is as follows:

[0027] During installation, insert the ball head of one end of the ball-head connecting rod 1 into the connection hole of the equipment terminal, and then tighten the locking nut 2 to firmly fix it on the equipment terminal. Place the busbar in the area corresponding to the T-shaped groove 6 on the top of the conductive transition block. By using the cooperation between the ball head of the other end of the ball-head connecting rod 1 and the ball socket at the bottom of the conductive transition block, the spatial angle of the conductive transition block and the subsequent pressure plate 5 assembly can be adjusted as a whole to make fine adjustments to adapt to the direction of the busbar. Place the T-shaped head of the connecting bolt 9 into the T-shaped groove 6 of the conductive transition block, cover it with the pressure plate 5, and let the connecting bolt 9 pass through the through hole on the pressure plate 5. The pressure plate 5 and the conductive transition block cooperate to clamp the busbar. Put on the elastic corrugated washer 8, tighten the fixing nut 10, and the pressure plate 5 firmly presses the busbar onto the conductive transition block. During this process, the elastic corrugated washer 8 is compressed to reserve elastic pressure for subsequent operation.

[0028] During operation, electrical energy is conducted from the equipment terminals through the ball joint connecting rod 1 to the conductive transition block, and then through the contact surface to the busbar. The entire connection path avoids direct contact between copper and aluminum, ensuring stable electrical performance. When vibration occurs, the elastic wave washer 8 continuously compensates to maintain stable pressure. When a small displacement occurs between the equipment terminals and the busbar due to thermal expansion and contraction, the universal joint characteristics at the ball joint can absorb the displacement, preventing destructive mechanical stress at the connection point. If the connection point overheats due to an accident, the high-temperature reversible color-changing coating on the side of the pressure plate 5 will issue a visual alarm, prompting maintenance personnel to intervene.

[0029] The present invention and its embodiments have been described above. This description is not restrictive, and the embodiments shown throughout the text are only one of the embodiments of the present invention. The actual structure is not limited to this. In conclusion, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit of the present invention, such design should fall within the protection scope of the present invention.

Claims

1. A busbar clamp for power transmission and transformation equipment, characterized in that, include: The device connection module includes a ball-head connecting rod and a locking nut threaded onto the ball-head connecting rod. One end of the ball-head connecting rod is used to mate with a connection hole on the device terminal and is locked and fixed by the locking nut. The busbar connection module includes a conductive transition block that mates with the ball head at the other end of the ball head connecting rod, a pressure plate, and a connecting unit. The top surface of the conductive transition block and the bottom surface of the pressure plate are both provided with opposing T-shaped grooves. The pressure plate has a through hole communicating with the T-shaped groove. The connecting unit includes a connecting bolt slidably disposed in the T-shaped groove of the conductive transition block, and the connecting bolt is threaded through the through hole and connected to a fixing nut located above the pressure plate.

2. The busbar clamp for power transmission and transformation equipment according to claim 1, characterized in that: The conductive transition block includes a copper plate and an aluminum plate laminated on the copper plate. The bottom surface of the copper plate has a socket that mates with the ball head of the ball head connecting rod, and the aluminum plate has the T-shaped groove.

3. The busbar clamp for power transmission and transformation equipment according to claim 1, characterized in that: The surfaces of the pressure plate and the conductive transition block that contact the busbar are arc surfaces with a mesh pattern.

4. A busbar clamp for power transmission and transformation equipment according to claim 1, characterized in that: An elastic corrugated washer is fitted on the connecting bolt between the pressure plate and the fixing nut.

5. A busbar clamp for power transmission and transformation equipment according to claim 1, characterized in that: The side of the pressure plate is coated with a high-temperature reversible color-changing coating.

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