Bus duct pin stabilizing structure and pin device

Abstract

The application discloses a bus duct pin stabilizing structure and a pin device, and belongs to the technical field of low-voltage power distribution equipment. The application aims to solve the problem of uneven receiving force and easy deflection of the existing L-shaped pin caused by unilateral fixation. The pin stabilizing structure comprises a pin stabilizing plate, at least one longitudinal reinforcing rib is arranged on the pin stabilizing plate, and the pin stabilizing plate is fixedly connected to the plug-in box shell and abuts against the back side of the L-shaped pin in the plug-in state. The pin device comprises a pin seat, an L-shaped pin and the stabilizing structure. The L-shaped pin is installed in the pin seat and is fixed on one side. The pin stabilizing plate applies lateral support to the back side of the L-shaped pin. The stabilizing plate with the longitudinal reinforcing rib is externally added, the plug-in deflection force is effectively balanced, the pin displacement is limited, the contact is kept stable, and the reliability and safety of the large-current plug-in are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of low-voltage power distribution equipment technology, specifically to a plug device for a busbar trunking plug box, and more particularly to a plug device with a stabilizing plate. Background Technology

[0002] With the continuous development of modern building and industrial power distribution systems, the reliability of the plug-in connection between the plug-in box and the busbar trunking, as the main line of low-voltage power transmission and distribution, directly affects the safe operation of the entire system.

[0003] Among them, the plug device is the key component in the plug box that enables electrical contact with the busbar branch terminals.

[0004] In recent years, the market demand for single-pin current carrying capacity has been increasing, with a trend towards reaching 800A or even higher. This poses a severe challenge to the structural stability and contact reliability of pin devices.

[0005] In existing technologies, high-current pins generally adopt an L-shaped structure design and are fixed to the pin socket or connector housing by a single-sided bolt. However, this L-shaped pin has the following shortcomings during the insertion process:

[0006] First, uneven force on the plug: Due to its asymmetrical geometry, the L-shaped plug has uneven force on one side when inserted into the tap head.

[0007] Because it is fixed by bolts on only one side, the free end of the plug is prone to deflection to the outside under the action of the plug reaction force, which reduces the contact area between the plug and the tap head, increases the contact resistance, and causes excessive local temperature rise, which seriously affects the conductivity reliability and service life.

[0008] Second, there is a lack of effective lateral support: In existing plug devices, when the L-shaped plug is inserted into the busbar duct socket box, there is a lack of a dedicated support structure on its back side (i.e. the side away from the plug contact surface) to balance the plug reaction force. This may cause the plug to undergo plastic deformation after long-term use or repeated plugging and unplugging, further aggravating uneven stress and even leading to contact failure.

[0009] Third, safety hazards are prominent under high current applications: When the current carrying capacity is increased to 800A and above, the temperature rise caused by uneven stress and poor contact is particularly serious. This not only accelerates the oxidation and aging of the plug material, but may also cause thermal deformation of the insulation components, which may lead to short circuit or arcing faults, posing a major safety hazard to the power distribution system.

[0010] Therefore, there is an urgent need in the existing technology for a pin stabilization structure and pin device that can effectively balance the insertion force of L-shaped pins, prevent pin misalignment, and improve the reliability of high-current insertion. Summary of the Invention

[0011] The present invention aims to solve the technical problems of uneven force on the L-shaped plug in the existing busbar trunking plug device, lack of lateral support, and easy deflection caused by unilateral fixing. The invention provides a stable structure and plug device for busbar trunking plugs.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A busbar trunking pin stabilization structure includes a pin stabilization plate.

[0014] The pin stabilizing plate is provided with at least one longitudinal reinforcing rib and is fixedly connected to the outer shell of the plug box. In the plugged state, it abuts against the back side of the L-shaped plug. Through the above structure, the pin stabilizing plate can provide lateral support to the L-shaped plug from the outside, thereby balancing the skew force generated during the plugging process and preventing the L-shaped plug from shifting outward.

[0015] Furthermore, the pin stabilizing plate is provided with multiple fixing bolts, which form a detachable connection with the plug box shell, facilitating installation and maintenance.

[0016] Preferably, there are three longitudinal stiffeners, arranged parallel to each other along the length of the insert stabilizing plate, to enhance its bending stiffness.

[0017] The present invention also provides a busbar trunking plug device, which includes a plug base, an L-shaped plug, and the aforementioned busbar trunking plug stabilizing structure.

[0018] The L-shaped pin is installed inside the pin socket and fixed to the pin socket or the outer shell of the connector box on one side. The pin stabilizing plate is fixed to the outer shell of the connector box and abuts against the back side of the L-shaped pin, thereby providing lateral support to the L-shaped pin during insertion. Through the above combination, the pin stabilizing plate, the L-shaped pin, the pin socket and the outer shell of the connector box together form a stable force system, which effectively improves the force state of the L-shaped pin.

[0019] When the plug device is inserted into the busbar slot, the free end of the L-shaped plug is subjected to the insertion reaction force from the tap head. This reaction force causes the L-shaped plug to tend to deflect outward around its fixed end. At this time, the plug stabilizing plate abutting against the back side of the L-shaped plug directly bears the deflection pressure from the L-shaped plug and transmits this pressure to the plug box housing. Through this force transmission path, the deflection displacement of the L-shaped plug is effectively limited, thereby maintaining stable contact between the plug and the tap head.

[0020] Furthermore, the back side of the L-shaped pin refers to the main force-bearing surface on the L-shaped pin that faces away from the insertion direction and bears the insertion reaction force during the insertion process. This definition clarifies the position and function of the back side.

[0021] The pin stabilizing plate abuts against the middle or upper part of the back side of the L-shaped pin. This position is chosen to balance the skew torque of the free end of the pin and achieve the best lateral support effect.

[0022] The socket is an insulated base, with L-shaped pins embedded in it and their free ends extending out of the socket to ensure reliable electrical contact with the busbar tap head.

[0023] The pin stabilizing plate is connected to the socket housing by fixing bolts, while the pin stabilizing plate and the back side of the L-shaped pin adopt surface contact or line contact, which can be selected according to the actual stress requirements to optimize contact stress and installation tolerance.

[0024] The pin stabilizing plate is made of high-strength insulating material, which not only provides sufficient mechanical strength but also avoids creating additional electrical paths between the pin stabilizing plate and the L-shaped pin, ensuring electrical safety.

[0025] In addition, the bending stiffness of the pin stabilizing plate is greater than that of the L-shaped pin, which allows the pin stabilizing plate to act as a rigid support to effectively limit the deformation of the L-shaped pin when it is subjected to force, without itself undergoing significant bending.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] First, it effectively solves the problem of uneven force distribution in L-shaped plugs: by adding an independent plug stabilizing plate, it provides lateral support to the back side of the L-shaped plug from the outside, balancing the skew force generated during the plugging process and preventing the plug from shifting outward, thereby ensuring the stability of the contact area and contact pressure between the plug and the tap head.

[0028] Second, it improves the reliability of high-current plugging: Since the pin stabilizing plate restricts the skew of the L-shaped pin, the contact resistance is kept at a low level, avoiding excessive local temperature rise caused by uneven force, thereby delaying the oxidation and aging of the pin material and extending its service life.

[0029] Third, the structure is simple and easy to install: the pin stabilizing plate is detachably connected to the socket box shell by fixing bolts, and can be installed and used without complicated modifications to the existing L-shaped pins and pin sockets, which facilitates the upgrade and maintenance of existing products.

[0030] Fourth, it has excellent electrical safety: the pin stabilizing plate is made of high-strength insulating material, which provides mechanical support without introducing additional electrical paths between the pins and the socket housing, thus avoiding the risk of short circuit.

[0031] In summary, the busbar duct plug stabilization structure and plug device provided by the present invention effectively overcomes the defects of uneven force and easy skewing of existing L-shaped plugs by adding an external stabilizing plate with longitudinal reinforcing ribs, and significantly improves the reliability and safety of high current plugging. Attached Figure Description

[0032] Figure 1 This is a three-dimensional assembly structure diagram of the pin device of the present invention;

[0033] Figure 2 This is a three-dimensional exploded view of the pin assembly of the present invention;

[0034] Figure 3 This is a top view of the pin-stabilized plate structure;

[0035] Figure 4 This is a side view of the plug assembly (showing the plug stabilizing plate abutting against the back side of the L-shaped plug).

[0036] Figure 5 This is a diagram showing the force applied to the pins (the arrows in the diagram indicate the direction of the force during insertion).

[0037] Figure 6 This is an exploded view of the assembly of the pin assembly and the connector box.

[0038] In the diagram: 1. Pin assembly; 2. L-shaped pin; 3. Pin socket; 4. Pin stabilizing plate; 401. Longitudinal reinforcing rib; 402. Fixing bolt; 5. Connector box housing. Detailed Implementation

[0039] To enhance understanding of the present invention, the invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only for explaining the invention and do not constitute a limitation on the scope of protection of the invention.

[0040] like Figures 1 to 6 As shown, the present invention provides a busbar trunking pin stabilization structure and pin device installed inside the plug box, which includes an L-shaped pin 2, a pin socket 3 and a pin stabilization plate 4.

[0041] Among them, the L-shaped plug 2 is used to connect with the tap head of the busbar trunking, the plug seat 3 is used to fix and position the L-shaped plug 2, and the plug stabilizing plate 4, as the core improved component of the present invention, is used to provide lateral support for the L-shaped plug 2 during the plugging process.

[0042] The socket 3 is injection molded from insulating material, and its interior has a mounting groove that matches the shape of the L-shaped socket 2.

[0043] The L-shaped plug 2 is embedded in the mounting groove and fixed to the plug base 3 or directly to the outer shell 5 of the plug box by a single-sided bolt. Its free end extends out of the plug base 3 so that it can be inserted into the busbar trough socket box to contact the tap head during plugging. The L-shaped plug 2 has an L-shaped bending structure with a bending angle of approximately 90 degrees. One side is the fixed end and the other side is the free end. Due to the single-sided fixing method, the free end is prone to deflecting outward around the fixed end when subjected to plugging reaction force.

[0044] The pin stabilizing plate 4 is a long strip-shaped plate component made of high-strength insulating materials (such as reinforced nylon or phenolic resin).

[0045] like Figure 2 and Figure 3 As shown, three longitudinal reinforcing ribs 401 are provided on one side surface of the plug-in stabilizing plate 4. These three reinforcing ribs are arranged parallel to each other along the length of the plug-in stabilizing plate 4 and run through its entire length. Their cross-section is roughly rectangular or trapezoidal. Their function is to significantly improve the bending stiffness of the plug-in stabilizing plate 4, so that it is not easy to bend and deform when subjected to pressure. The plug-in stabilizing plate 4 is also provided with multiple bolt holes. By passing the fixing bolts 402 through these bolt holes and engaging with the threaded holes on the plug-in box housing 5, the plug-in stabilizing plate 4 can be detachably fixed to the inner wall of the plug-in box housing 5. The number of fixing bolts 402 is usually two or more to ensure the stability of the connection.

[0046] When assembled, the pin stabilizing plate 4 is located on the back side of the L-shaped pin 2. The back side refers to the side of the L-shaped pin 2 that faces away from the insertion direction, which is the main force-bearing surface that bears the insertion reaction force during the insertion process.

[0047] Specifically, when the plug device 1 is inserted into the busbar slot, the free end of the L-shaped plug 2 is subjected to a thrust from the tap head. The direction of this thrust is approximately perpendicular to the insertion direction, causing the L-shaped plug 2 to tend to deflect outward (i.e., to the side facing away from the insertion contact surface). The plug stabilizing plate 4 rests precisely against the upper-middle area of ​​the back side of the L-shaped plug 2. Figure 4 As shown; the contact method can be surface contact or line contact. In this embodiment, surface contact is used, that is, the contact surface of the pin stabilizing plate 4 is basically parallel and fits the back side of the L-shaped pin 2, so that the pressure is evenly distributed. In another optional embodiment, a raised ridge can be provided on the contact surface of the pin stabilizing plate 4 to achieve line contact, thereby reducing the installation tolerance requirements.

[0048] When the plug device 1 is inserted into the busbar slot, the free end of the L-shaped plug 2 is subjected to the insertion reaction force, which generates a torque that deflects outward. Since the plug stabilizing plate 4 abuts against the back side of the L-shaped plug 2, the deflection force is directly transmitted to the plug stabilizing plate 4, and then transmitted to the plug box housing 5 through the fixing bolt 402.

[0049] The outer shell 5 of the plug box is made of metal and has high rigidity and strength. It can withstand the pressure without significant deformation. Therefore, the skew displacement of the L-shaped plug 2 is strictly limited to a very small range. The contact position between its free end and the tap head remains stable, and the contact pressure will not be significantly reduced due to skew.

[0050] To achieve stable rigid support, the bending stiffness of the pin stabilizing plate 4 is designed to be greater than the bending stiffness of the L-shaped pin 2 itself.

[0051] In this embodiment, by setting three longitudinal reinforcing ribs 401 and using high-strength insulating material, the moment of inertia and elastic modulus of the plug stabilizing plate 4 are significantly higher than those of the L-shaped plug 2, thereby ensuring that when the plug is subjected to force, the plug stabilizing plate 4, as a rigid support, hardly undergoes bending deformation and can always maintain reliable positioning of the L-shaped plug 2.

[0052] At the same time, since the bending stiffness of the pin stabilizing plate 4 is much greater than that of the L-shaped pin 2, the L-shaped pin 2 does not need to rely on its own elastic deformation to resist the skew force, thus avoiding fatigue failure that may be caused by long-term repeated stress.

[0053] In practical use, the pin stabilizing plate 4 can be pre-installed on the plug box housing 5 during plug box assembly, or it can be added to the existing plug box as an after-sales upgrade component. During installation, simply align the pin stabilizing plate 4 with the bolt holes on the inside of the plug box housing 5 and tighten it with the fixing bolts 402. Disassembly is also convenient, facilitating maintenance or replacement.

[0054] Implementation Example

[0055] Taking a large data center power distribution system as an example, the data center uses a dense bus trunking as the main line, and the single power supply current requirement is 800A. The bus trunking plug box is equipped with multiple L-shaped plugs 2, and the current carrying capacity of each L-shaped plug 2 must meet the requirement of 800A.

[0056] Without the pin stabilizing plate 4 installed, the plugging test found that the L-shaped pin 2 deviated significantly outward after repeated plugging and unplugging, resulting in increased contact resistance between the pin and the tap head, and local temperature rise exceeding the standard limit.

[0057] The busbar trunking pin stabilization structure and pin device provided by this invention are improved.

[0058] In specific implementation, a pin stabilizing plate 4 made of reinforced nylon 66 material is selected for injection molding. The stabilizing plate is provided with three longitudinal reinforcing ribs 401 with a thickness of 5mm. The overall bending stiffness has been tested and found to be above 6kN.

[0059] The pin stabilizing plate 4 is fixed to the inner wall of the socket housing 5 with two M6 fixing bolts 402, so that it abuts against the upper middle part of the back side of each L-shaped pin 2.

[0060] After assembly, a connection test is performed in accordance with GB / T 7251.6 standard.

[0061] Test results show that under 800A current conditions, the temperature rise of the pin device 1 is reduced by about 15K compared with that without the stabilizing plate. After 500 insertions and removals, the L-shaped pin 2 does not show any visible skew or deformation, and the contact resistance remains stable.

[0062] In the salt spray test simulating a humid environment, the insulation performance of the pin stabilizing plate 4 did not decrease, and no short circuit or arcing faults occurred.

[0063] This embodiment demonstrates that the busbar trunking pin stabilization structure and pin device provided by the present invention can effectively solve the problems of uneven force and skewness of L-shaped pin 2 during high-current plugging, significantly improve plugging reliability and safety, and has broad industrial application value.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A busbar trunking pin stabilization structure, characterized in that, include: Pin stabilizer plate; The pin stabilizing plate is provided with at least one longitudinal reinforcing rib; The pin stabilizing plate is fixedly connected to the outer shell of the plug box and abuts against the back side of the L-shaped pin when plugged in.

2. The busbar trunking pin stabilization structure according to claim 1, characterized in that, The pin stabilizing plate is provided with multiple fixing bolts, which are detachably connected to the outer shell of the plug box.

3. The busbar trunking pin stabilization structure according to claim 1, characterized in that, The longitudinal reinforcing ribs consist of three lines, arranged parallel to each other along the length of the insert stabilizing plate.

4. A busbar trunking connector device, characterized in that, include: The connector, the L-shaped pin, and the busbar trunking pin stabilization structure as described in any one of claims 1 to 3; The L-shaped pin is installed inside the pin socket and is fixed to the pin socket or the outer shell of the plug box by one side; The pin stabilizing plate is fixed to the outer shell of the plug box and abuts against the back side of the L-shaped pin. The pin stabilizing plate provides lateral support to the L-shaped pin during plugging.

5. The busbar trunking connector device according to claim 4, characterized in that, The back side of the L-shaped pin refers to the main force-bearing surface of the L-shaped pin that faces away from the insertion direction and bears the insertion reaction force during the insertion process.

6. The busbar trunking connector device according to claim 4, characterized in that, The pin stabilizing plate abuts against the middle or upper region of the back side of the L-shaped pin.

7. The busbar trunking connector device according to claim 4, characterized in that, The socket is an insulating base, and the L-shaped pin is embedded in the socket, with the free end of the L-shaped pin extending out of the socket.

8. The busbar trunking connector device according to claim 4, characterized in that, The pin stabilizing plate is connected to the socket housing by fixing bolts, and the pin stabilizing plate and the back side of the L-shaped pin are in surface contact or line contact.

9. The busbar trunking connector device according to claim 4, characterized in that, The pin stabilizing plate is made of high-strength insulating material.

10. The busbar trunking connector device according to claim 4, characterized in that, The bending stiffness of the pin stabilizing plate is greater than that of the L-shaped pin.

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