A tapping mechanism for low voltage distribution boxes
Patent Information
- Application Number
- CN202522037982.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-23
- Publication Date
- 2026-09-01
- Estimated Expiration
- 2035-09-23
AI Technical Summary
其中，固定式分接结构通常通过螺栓连接、焊接或硬导线直接对接的方式实现电能分接，这类结构虽在连接强度上具备一定优势，但存在显著的局限性：一方面，在安装与后期维护过程中，需要借助专用工具对螺栓进行反复拆卸与紧固，操作流程繁琐，不仅延长了施工周期，还容易因螺栓紧固力矩不均导致接触电阻增大，进而引发局部过热现象，严重时可能造成导线烧毁、绝缘层老化失效等安全隐患；另一方面，固定式分接结构的分接回路数量与规格在出厂时已固定，无法根据实际用电需求的变化灵活增减分接支路，当终端负载扩容或线路改造时，往往需要对整个分接机构甚至配电箱进行更换，极大地增加了用户的使用成本与资源浪费
[0012]综上所述，本申请包括以下有益技术效果：分接机构的连接起始阶段以 “插合导向” 为核心，利用分接板 与连接块 的结构适配性完成预定位。首先，操作人员无需借助复杂工具，仅需手动将连接块 后端固定的L 型插块 对准分接板 前端的缺口槽 ——由于 L 型插块 与缺口槽 的形状、尺寸完全匹配，且分接板 的长度与后端 L 型插板一致（可辅助校准整体安装位置），L 型插块 能顺畅插入缺口槽 内部，同时嵌入缺口槽内的插槽 中。这一过程通过机械结构的精准适配，快速限制分接板 与连接块 在水平、垂直方向的相对位移，无需反复调整对位，实现 “一插即准” 的预固定效果，为后续固定操作奠定基础，有效缩短安装时间。在分接板 与连接块 完成预定位后，操作人员可将需要分接的外部导线（如配电箱内的分支电源线）通过连接块 上下两端开设的通孔 穿入其内部的空腔 —— 因通孔 与空腔 完全相通，导线无需绕行或裁剪适配长度，可直接贯穿至空腔 内指定位置。
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Abstract
Description
Technical Field
[0001] The present application relates to the technical field of tapping mechanisms for low-voltage distribution boxes, and in particular to a tapping mechanism for low-voltage distribution boxes. Background Art
[0002] In the power distribution link of power systems, low-voltage distribution boxes, as core equipment for electric energy distribution and control, are widely used in industrial plants, commercial buildings, residential quarters and various infrastructure scenarios. They undertake the key function of converting medium-voltage electric energy into low-voltage electric energy and distributing it to terminal loads such as lighting, power equipment and household appliances as needed. With the continuous improvement of social electrification level, the types of terminal electrical equipment are increasing and the power demand keeps growing, which puts forward more stringent requirements on the distribution flexibility, reliability and safety of low-voltage distribution boxes. As a core component for realizing electric energy branching, transfer and regulation inside low-voltage distribution boxes, the performance of the tapping mechanism directly determines the operation efficiency and stability of the entire power distribution system.
[0003] At present, the traditional tapping mechanisms used in low-voltage distribution boxes are mainly divided into two types: fixed tapping structures and simple plug-in tapping structures. Among them, the fixed tapping structure usually realizes electric energy tapping by means of bolt connection, welding or direct butt joint of hard conductors. Although such structures have certain advantages in connection strength, they have significant limitations. On one hand, during installation and later maintenance, special tools are required to repeatedly disassemble and tighten bolts, which makes the operation process cumbersome. This not only prolongs the construction period, but also easily leads to an increase in contact resistance due to uneven bolt tightening torque, which in turn causes local overheating. In severe cases, it may cause safety hazards such as conductor burning and insulation layer aging and failure. On the other hand, the number and specifications of tapping circuits of the fixed tapping structure are fixed when leaving the factory, and it is impossible to flexibly increase or decrease tapping branches according to changes in actual power demand. When the terminal load is expanded or the line is modified, it is often necessary to replace the entire tapping mechanism or even the distribution box, which greatly increases the user's use cost and causes resource waste.
[0004] While the simple plug-in tap structure simplifies the installation process to some extent, enabling quick tapping through the connection of the plug and socket, its structural design also presents problems that cannot be ignored. First, these tap changers have a small contact area, making them prone to arcing when carrying high currents. This arcing is particularly pronounced during frequent plugging / unplugging or load switching, exacerbating contact wear, shortening lifespan, and potentially causing electrical sparks that damage internal insulation components of the distribution box, even leading to fires. Second, simple plug-and-play tap changers lack effective anti-misplugging and anti-loosening designs. In vibrating environments (such as mechanical vibrations in industrial plants or environmental vibrations in buildings along transportation routes), poor contact between the plug and socket is highly likely, leading to intermittent power outages and affecting the normal operation of electrical equipment. Furthermore, traditional tap changers generally lack optimized designs for waterproofing and dustproofing. In humid and dusty environments (such as underground garages or outdoor temporary power distribution scenarios), moisture and dust can easily penetrate the tap changer, causing corrosion of metal components and decreased insulation performance, further reducing the reliability and safety of the power distribution system. Those skilled in the art provide a tap changer for low-voltage distribution boxes to address the problems mentioned in the background. Utility Model Content
[0005] To address the problems mentioned in the background art, this application provides a tap changer for a low-voltage distribution box.
[0006] The tap changer for a low-voltage distribution box provided in this application adopts the following technical solution:
[0007] A tapping mechanism for a low-voltage distribution box includes a tapping plate, an L-shaped plug plate fixedly installed at the rear end of the tapping plate, the length of the tapping plate being the same as that of the L-shaped plug plate, a notch groove being provided at the front end of the tapping plate, a slot being provided inside the notch groove, and a connecting block being provided at the front of the tapping plate.
[0008] Preferably, an L-shaped insert is fixedly installed at the rear end of the connecting block, and the L-shaped insert is matched with the notch.
[0009] Preferably, the connecting block has through holes at both its upper and lower ends, and a cavity is provided inside the connecting block.
[0010] Preferably, the through hole communicates with the cavity, and the external thread of the connecting block has a threaded rod through it.
[0011] Preferably, a fixing gasket is fixedly installed on one side of the inner wall of the cavity, one end of the screw penetrates the interior of the cavity, and an abutment gasket is fixedly installed on one end of the screw.
[0012] In summary, this application includes the following beneficial technical effects: The initial connection stage of the tapping mechanism is based on "insertion guidance," utilizing the structural compatibility between the tapping plate and the connecting block to achieve pre-positioning. Firstly, the operator does not need complex tools; they only need to manually align the L-shaped insert fixed at the rear end of the connecting block with the notch at the front end of the tapping plate. Because the shape and size of the L-shaped insert perfectly match the notch, and the length of the tapping plate is consistent with the rear L-shaped insert (which can assist in calibrating the overall installation position), the L-shaped insert can smoothly insert into the notch and simultaneously embed into the slot within it. This process, through precise mechanical adaptation, quickly restricts the relative displacement of the tapping plate and the connecting block in the horizontal and vertical directions, eliminating the need for repeated alignment adjustments and achieving a "one-click" pre-fixing effect, laying the foundation for subsequent fixing operations and effectively shortening installation time. After the tapping plate and connecting block are pre-positioned, the operator can insert the external wires that need to be tapped (such as branch power lines in the distribution box) through the through holes at the top and bottom of the connecting block into its internal cavity. Since the through holes are completely connected to the cavity, the wires do not need to be detoured or cut to the appropriate length and can be directly inserted into the designated position in the cavity. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of a tap changer for a low-voltage distribution box according to an embodiment of this application;
[0014] Figure 2 This is a schematic diagram of the connecting block structure of a tap changer for a low-voltage distribution box according to an embodiment of this application;
[0015] Figure 3 This is a schematic diagram of the connecting block structure of a tap changer for a low-voltage distribution box in an embodiment of this application.
[0016] Explanation of reference numerals in the attached diagram: 1. Split plate; 2. L-shaped insert plate; 3. Notch; 4. Slot; 5. Connecting block; 6. Screw; 7. Through hole; 8. L-shaped insert block; 9. Cavity; 10. Fixing gasket; 11. Abutment gasket. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0018] The illustrative embodiments and descriptions of the present invention are provided herein to explain the invention, but are not intended to limit the invention.
[0019] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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 invention according to the specific circumstances.
[0020] It should be understood that the terms "comprising / including," "consisting of," or any other variations are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.
[0021] It should also be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation of the present invention.
[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.
[0023] like Figures 1-3 As shown, a tapping mechanism for a low-voltage distribution box includes a tapping plate 1, an L-shaped plug plate 2 fixedly installed at the rear end of the tapping plate 1, the length of the tapping plate 1 being the same as that of the L-shaped plug plate 2, a notch 3 being provided at the front end of the tapping plate 1, a slot 4 being provided inside the notch 3, and a connecting block 5 being provided at the front of the tapping plate 1.
[0024] In this embodiment, an L-shaped plug 8 is fixedly installed at the rear end of the connecting block 5, and the L-shaped plug 8 is matched with the notch 3.
[0025] In this embodiment, through holes 7 are provided at both the upper and lower ends of the connecting block 5, and a cavity 9 is provided inside the connecting block 5.
[0026] In this embodiment, the through hole 7 communicates with the cavity 9, and the external thread of the connecting block 5 passes through the screw 6.
[0027] In this embodiment, a fixing gasket 10 is fixedly installed on one side of the inner wall of the cavity 9, one end of the screw 6 penetrates the interior of the cavity 9, and an abutment gasket 11 is fixedly installed on one end of the screw 6.
[0028] The implementation principle of a tap changer mechanism for a low-voltage distribution box according to an embodiment of this application is as follows: In the initial connection stage of the tap changer mechanism, "insertion guidance" is the core, utilizing the structural compatibility of the tap changer plate 1 and the connecting block 5 to complete pre-positioning. First, the operator does not need complex tools; they only need to manually align the L-shaped plug 8 fixed at the rear end of the connecting block 5 with the notch 3 at the front end of the tap changer plate 1. Because the shape and size of the L-shaped plug 8 perfectly match the notch 3, and the length of the tap changer plate 1 is consistent with the rear L-shaped plug 2 (which can assist in calibrating the overall installation position), the L-shaped plug 8 can smoothly insert into the notch 3 and simultaneously embed into the slot 4 within the notch 3. This process, through precise adaptation of the mechanical structure, quickly restricts the relative displacement of the tap changer plate 1 and the connecting block 5 in the horizontal and vertical directions, eliminating the need for repeated alignment adjustments and achieving a "one-click" pre-fixing effect, laying the foundation for subsequent fixing operations and effectively shortening installation time. After the tap changer 1 and connecting block 5 are pre-positioned, the operator can insert the external wires to be tapped (such as branch power lines in the distribution box) through the through holes 7 at the top and bottom of the connecting block 5 into its internal cavity 9. Since the through holes 7 and cavity 9 are completely connected, the wires do not need to be routed or cut to the appropriate length and can be directly inserted into the designated position within cavity 9. Furthermore, the design of the double through holes at the top and bottom supports the simultaneous connection of two wires (such as live wire and neutral wire), meeting the needs of multi-line tapping. Compared to the complex process of traditional tap changers that require fixing the wires before connecting the main body, this structure optimizes the sequence of "alignment first, then wire insertion," avoiding tangling or positional shift of the wires during the connection process, further improving operational convenience. After the wires are threaded through, the screw 6 and the connecting block 5 are threaded together to quickly fix the wires to the connecting block. The operator only needs to use a regular wrench or screwdriver to turn the screw 6, which has its external thread through the connecting block 5. Since one end of the screw 6 passes through the cavity 9 and is fixed with a contact washer 11, as the screw 6 is screwed in, the contact washer 11 will move towards the fixed washer 10 on the inner wall of the cavity 9. When the contact washer 11 contacts the surface of the wire that has entered the cavity 9, the screw 6 is tightened further. The self-locking property of the thread can generate a continuous and uniform clamping force, so that the wire is firmly clamped between the contact washer 11 and the fixed washer 10. This process does not require repeated adjustment of the bolt torque. The clamping force can be controlled by the screw depth. This avoids the poor contact caused by uneven torque in traditional bolt connections and achieves a quick "tightening and fixing" operation, greatly reducing the difficulty of installation.Throughout the connection process, the mating structure of the L-shaped plug 8 and the notch 3 not only achieves pre-positioning but also limits the relative wobbling of the tap plate 1 and the connecting block 5 in the horizontal direction. Meanwhile, the clamping assembly consisting of the screw 6, the contact washer 11, and the fixing washer 10 securely locks the wire in the vertical direction, ensuring full contact between the wire and the connecting block 5 and reducing contact resistance. Furthermore, all connection operations require no special tools (or only conventional tools), and the structural compatibility of each component does not require complex calibration. Whether it's initial installation or disassembly and reassembly for later maintenance, it can be completed in three steps: "molding - threading - tightening," significantly improving operational efficiency. It also avoids the safety hazards caused by cumbersome installation and poor contact in traditional tapping mechanisms, achieving the dual goals of "convenient connection" and "reliable operation."
[0029] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.
[0030] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A tapping mechanism for a low voltage distribution box, characterized in that: Includes a splitter plate (1), with an L-shaped insert plate (2) fixedly installed at the rear end of the splitter plate (1). The length of the splitter plate (1) is the same as that of the L-shaped insert plate (2). A notch (3) is provided at the front end of the splitter plate (1), and a slot (4) is provided inside the notch (3). A connecting block (5) is provided at the front of the splitter plate (1).
2. A tapping mechanism for a low voltage distribution box according to claim 1, characterized in that: An L-shaped plug (8) is fixedly installed at the rear end of the connecting block (5), and the L-shaped plug (8) is matched with the notch (3).
3. The tap changer for a low-voltage distribution box according to claim 2, characterized in that: The connecting block (5) has through holes (7) at both the upper and lower ends, and a cavity (9) is provided inside the connecting block (5).
4. The tap changer for a low-voltage distribution box according to claim 3, characterized in that: The through hole (7) communicates with the cavity (9), and the external thread of the connecting block (5) is through which the screw (6) passes.
5. The tap changer for a low-voltage distribution box according to claim 4, characterized in that: A fixing gasket (10) is fixedly installed on one side of the inner wall of the cavity (9), and one end of the screw (6) penetrates the interior of the cavity (9), and an abutment gasket (11) is fixedly installed on one end of the screw (6).