Low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench and cable prefabrication system

Abstract

The utility model relates to a kind of low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench and cable prefabrication system, the workbench includes: workbench, positioning pillar, mounting plate and guide rail.Workbench, including the upper template and lower template of each other perpendicular arrangement, the surface of upper template and the surface of lower template are equipped with multiple positioning holes;Positioning pillar is set at positioning hole, and positioning pillar is positioned to cable by positioning hole;Mounting plate is connected with upper template and lower template respectively;Guide rail is set at the both sides of lower template, and guide rail supports upper template by mounting plate, and upper template can slide along guide rail.The workbench can realize accurate positioning, standardized operation and adapt to multi-specification quick switching, while significantly improving processing efficiency and reducing labor intensity.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage switchgear technology, and in particular to a low-voltage switchgear drawer unit primary and secondary cable prefabrication workbench and cable prefabrication system. Background Technology

[0002] In low-voltage power distribution systems, drawer-type switchgear is widely used as a core power distribution device. Currently, low-voltage drawer units in the industry generally adopt a modular design, and the layout and installation of their internal primary and secondary cables need to be adapted to different models and specifications. Traditionally, the manufacturing of primary and secondary cables for low-voltage switchgear drawer units relies on manual measurement and positioning, followed by individual piece-by-piece fabrication. This method suffers from problems such as inaccurate manual positioning and forming, non-standard manufacturing processes, inconsistent overall cable quality, and low manual production efficiency. Utility Model Content

[0003] Therefore, it is necessary to provide a low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench that can achieve precise positioning, standardized operation, adapt to rapid switching of multiple specifications, and improve production efficiency in response to the above problems.

[0004] In a first aspect, this utility model provides a prefabrication workbench for primary and secondary cables of a low-voltage cabinet drawer unit, the workbench comprising:

[0005] The workbench includes an upper template and a lower template arranged perpendicularly to each other, and multiple positioning holes are provided on the surface of the upper template and the surface of the lower template.

[0006] The positioning support is installed at the positioning hole, and the positioning support positions the cable through the positioning hole;

[0007] The mounting plates are connected to the upper and lower templates respectively;

[0008] Guide rails are installed on both sides of the lower template. The upper template is supported by the mounting plate and can slide along the guide rails.

[0009] In one embodiment, the workbench further includes:

[0010] The pressure block is placed between the mounting plate and the guide rail to fix the position of the guide rail.

[0011] In one embodiment, the plurality of positioning holes are plurality of equidistant flat-head hexagonal nut positioning holes.

[0012] In one embodiment, the positioning support includes a threaded rod and a hexagonal nut, the height of which is adjustable, and the positioning support is threadedly engaged with the positioning hole of the flat-head hexagonal nut.

[0013] In one embodiment, the positioning holes of the flat-head hexagonal nuts are arranged in a matrix, and the spacing of the positioning holes is set to the standard modular size of the low-voltage switchgear.

[0014] In one embodiment, the guide rail has a trapezoidal concave structure, the surface of the guide rail is marked with scale markings, and a limit block is provided at the end of the guide rail to limit the sliding distance of the upper template on the guide rail.

[0015] In one embodiment, the mounting plate has an L-shaped bent structure and is bolted to the lower template.

[0016] In one embodiment, the surface of the positioning post is fitted with an insulating heat-shrink tubing.

[0017] In one embodiment, the bottom of the lower template is provided with a fixing device for fixing the lower template to the workbench.

[0018] Secondly, this utility model provides a low-voltage cabinet drawer unit primary and secondary cable prefabrication system, including the low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench in any of the embodiments of the first aspect above.

[0019] The aforementioned low-voltage switchgear drawer unit primary and secondary cable prefabrication workbench consists of two positioning plates: an upper template and a lower template. Positioning holes are evenly distributed on both templates, and positioning supports allow for accurate positioning based on the primary and secondary cable routing. Adjustable guide rails are installed on both sides of the lower template, which is then supported and fixed to the upper template via an installation plate. The upper template can be adjusted and fixed forward and backward according to the guide rails. Customized dimensions can accommodate different drawer unit specifications. Cable routing templates are measured and solidified inside the drawer, and after solidification, primary and secondary cable fabrication for the drawer units is carried out in batches. Through the upper and lower templates and positioning supports, accurate positioning of the primary and secondary cables can be achieved according to their routing. After cable positioning, batch cable prefabrication can be performed, achieving precise positioning, standardized operation, and adaptability to rapid switching between multiple specifications. This significantly improves processing efficiency and reduces labor intensity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench according to another embodiment of the present invention.

[0022] Figure label:

[0023] 10. Upper template; 110. Positioning hole; 20. Lower template; 30. Positioning support; 40. Mounting plate; 50. Guide rail; 60. Pressure block. Detailed Implementation

[0024] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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, and are not intended to indicate or imply that the device or element 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.

[0026] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] In low-voltage power distribution systems, drawer-type switchgear is widely used as a core power distribution device. Currently, low-voltage drawer units in the industry generally adopt modular design, and the layout and installation of the internal primary and secondary cables need to be adapted according to different models and specifications. In traditional production processes, the positioning and forming of cables inside the drawer unit mainly relies on manual operation: first, the operator visually inspects or uses simple tools to assist in measurement according to the drawing requirements, then manually marks the cable bending points and routing paths, and then bends and binds each cable one by one. This operation mode has the following significant defects: (1) The accuracy of manual measurement and positioning is greatly affected by the operator's experience, which easily leads to cumulative errors and poor consistency in cable forming; (2) The single-piece sequential production method is inefficient and cannot meet the needs of mass production; (3) There is a lack of standardized positioning benchmarks, and the process parameters of cables made by different batches or different operators are different, which affects the equipment assembly accuracy and subsequent maintenance; (4) The bending radius, stress distribution and other technical parameters of flexible cables are difficult to control accurately, which poses potential safety hazards. The industry urgently needs a low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench that can achieve precise positioning, standardized operation, and adapt to rapid switching of multiple specifications.

[0031] In one exemplary embodiment, such as Figure 1 As shown, a low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench is provided. The workbench includes: a work surface, positioning support column 30, mounting plate 40 and guide rail 50.

[0032] The worktable includes an upper template 10 and a lower template 20 arranged perpendicularly to each other. Multiple positioning holes 110 are provided on the surface of the upper template 10 and the surface of the lower template 20.

[0033] Optionally, the workbench surface consists of an upper template 10 and a lower template 20 arranged perpendicularly to each other, forming an L-shaped structure to facilitate three-dimensional positioning of cables. Both the upper template 10 and the lower template 20 have multiple positioning holes 110 on their surfaces for installing positioning supports 30 to accommodate the fixing requirements of cables of different specifications. The positioning holes 110 can be arranged in a matrix or distributed according to a specific cable routing path to ensure precise positioning of cable bending points and fixing points.

[0034] The positioning support 30 is set at the positioning hole 110, and the positioning support 30 positions the cable through the positioning hole 110.

[0035] Optionally, the positioning post 30 is detachably installed at the positioning hole 110 for supporting and securing the cable. The positioning post 30 can be of different heights or shapes (such as cylindrical rods, square rods, threaded rods, etc.) to accommodate the bending radius requirements of different cables. Some positioning posts 30 can be equipped with a flexible clamping mechanism to ensure that the cable is securely fixed without damaging the cable insulation layer.

[0036] Mounting plate 40 is connected to upper template 10 and lower template 20 respectively.

[0037] Optionally, the mounting plate 40 is connected to both the upper template 10 and the lower template 20 to enhance the stability of the overall structure. The mounting plate 40 can be made of sheet metal or high-strength composite material to ensure that the workbench does not deform during long-term use.

[0038] Guide rails 50 are set on both sides of the lower template 20. The guide rails 50 support the upper template 10 through the mounting plate 40, and the upper template 10 can slide along the guide rails 50.

[0039] Optionally, guide rails 50 are located on both sides of the lower template 20 and support the upper template 10 via mounting plates 40. The upper template 10 can slide along the guide rails 50 to accommodate the cable prefabrication requirements of drawer units of different sizes. The guide rails 50 can be linear slide rails or ball bearing guide rails to ensure smooth movement and accurate positioning of the upper template 10.

[0040] For example, Figure 2 This is a schematic diagram of a prefabrication workbench for primary and secondary cables of a low-voltage cabinet drawer unit. The working principle of the workbench is as follows: First, according to the cable layout requirements of the target drawer unit, select the corresponding positioning holes 110 and install positioning supports 30; fix the cables along the positioning supports 30 to ensure that the bending radius and routing path meet the design requirements; adjust the spatial position of the cables by sliding the upper template 10 to adapt to the prefabrication requirements of drawer units of different specifications; after the cable positioning is completed, the cables can be tied and fixed by the positioning supports 30 to achieve batch standardized production. Figure 2The dimensions and processing parameters of each component of the workbench are shown in millimeters. The upper template 10 is 685mm wide, the total height of the upper template 10 and the mounting plate 40 is 385mm, the distance from the outermost mounting hole 110 to the shorter side of the upper template 10 is 70mm, the thickness of the lower template 20 is 75mm, the width of the guide rail 50 is 18mm, the distance from the axis of the guide rail 50 to the bottom of the lower template 20 is 29mm, the width of the support area at the bottom of the lower template 20 is 22mm, the height of the pressure block 60 is 40mm, and the total width of the lower template 20, the mounting plate 40 and the pressure block 60 is 684.2mm, etc.

[0041] The aforementioned low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench, through the cooperation of positioning holes 110 and positioning supports 30, ensures the accurate positioning of cable bending points and fixing points, reduces manual measurement and adjustment, lowers operational difficulty, reduces human error, and improves production stability; at the same time, it adapts to the cable prefabrication requirements of drawer units of different specifications, is suitable for batch production, avoids the inefficiency of single-piece production, improves production efficiency, and ensures process consistency.

[0042] In one exemplary embodiment, such as Figure 1 As shown, the worktable also includes: pressure block 60.

[0043] The pressure block 60 is positioned between the mounting plate 40 and the guide rail 50 to fix the position of the guide rail 50.

[0044] For example, the pressure block 60 is made of high-strength alloy material and has a concave structure to engage with the guide rail 50. The pressure block 60 can be connected to the mounting plate 40 via adjusting bolts. The pressure block 60 is equipped with a locking mechanism to fix the position of the guide rail 50, such as an eccentric wheel quick-locking mechanism to achieve quick fixing and release of the guide rail 50. The contact surface between the pressure block 60 and the guide rail 50 can be provided with anti-slip texture to increase the coefficient of friction, and an embedded elastic pad can be provided to avoid damage to the guide rail surface; the pressure block 60 can be provided with a limiting boss to prevent deformation caused by excessive clamping.

[0045] In one exemplary embodiment, such as Figure 2 As shown, the multiple positioning holes 110 are multiple equidistant positioning holes for flat-head hexagonal nuts.

[0046] For example, the multiple positioning holes 110 adopt an equidistant arrangement of flat-head hexagonal nut positioning holes. Various sizes of flat-head hexagonal nuts can be embedded in the positioning holes. The upper surface of the nuts is flush with the template plane, forming a non-protruding working surface. The nuts are fixed using an anti-loosening process to ensure they do not fall off during long-term use. The positioning holes in the edge area are at a predetermined distance from the edges of the upper and lower templates. Additional holes can be provided on the upper and lower templates for special positioning requirements.

[0047] In one exemplary embodiment, the positioning support 30 includes a threaded rod and a hexagonal nut, the height of which is adjustable, and the positioning support 30 is threadedly engaged with the positioning hole of the flat-head hexagonal nut.

[0048] For example, the positioning support 30 can adopt a modular adjustable structure, with a threaded screw at the bottom that mates with the threaded positioning hole of a flat-head hexagonal nut. The upper part features replaceable functional heads, such as a standard cylindrical head for positioning ordinary cables; a V-groove head for fixing multi-core cables; and a flexible clamp for fixing precision cables without damage. An adjusting nut in the middle allows for fine-tuning of the height. The surface of the positioning support 30 can also be marked with graduations for precise height adjustment.

[0049] In one exemplary embodiment, such as Figure 2 As shown, the positioning holes of the flat-head hexagonal nuts are arranged in a matrix, and the spacing of the positioning holes of the flat-head hexagonal nuts is set to the standard modular size of the low-voltage switchgear.

[0050] For example, the positioning holes of the flat-head hexagonal nuts are arranged in a standard matrix, and the hole spacing is set to a standard modular size, based on a standardized size of E=25mm or E=44mm. The upper and lower templates are customized according to the drawer unit size, which can meet the primary and secondary cable production of different unit drawers of 8E / 2, 8E, 12E, 16E, and 24E.

[0051] For 8E / 2 unit drawers, flat cabling is required, with ultra-flexible cables preferred. Use mini cable ties or Velcro for securing cables to avoid occupying vertical space. For 8E unit drawers, primary cables (single-phase or three-phase main circuits) must have a U-bend allowance to prevent stress concentration during insertion and removal. Secondary control cables must be parallel to and separated from primary cables by a certain distance, or isolated with metal partitions to reduce electromagnetic interference. For 12E / 16E unit drawers, when primary cables have a large cross-sectional area, use double parallel conductors or copper busbars for transition, and add ventilation holes. Secondary cables can be bundled independently according to functional zones (e.g., signal, power, communication) and connected via quick-connect terminals. For 24E (high-capacity, high-density) unit drawers, primary cables should run through the top high-voltage channel, and secondary cables through the bottom low-voltage channel, with insulation boards separating layers. Critical control circuits (e.g., interlocking signals) require dual backup cables and independent grounding wires.

[0052] For example, cable binding points and positioning holes are distributed at intervals of E or 0.5E. The bending radius of the primary cable is ≥6 times the wire diameter, and the bending points must be aligned with the modular grid (e.g., avoiding the connector positions of the 8E drawer). The guide rail spacing of the workbench is preset according to standards such as 8E / 2, 8E, and 24E, allowing for quick switching between cable templates for different drawers. The positioning holes of the workbench template are arranged modularly, compatible with various wire harness routes. The primary cable length of the 8E drawer = drawer depth + 2E (redundancy); due to the increased height of the 24E drawer, segmented prefabricated wire harnesses (e.g., power section + control section) are required, spliced ​​together using modular connectors.

[0053] In the above embodiments, the corresponding positioning hole group is selected according to the module of the drawer unit, the key points of the cable path are quickly determined using the positioning gauge, and the cable is laid along the positioning support, realizing the standardization and modularization of the prefabrication of low-voltage power distribution equipment cables.

[0054] In an exemplary embodiment, the guide rail 50 has a trapezoidal concave structure, the surface of the guide rail 50 is provided with scale markings, and a limit block is provided at the end of the guide rail 50 to limit the sliding distance of the upper template 10 on the guide rail 50.

[0055] For example, the guide rail 50 adopts a unique trapezoidal concave structure design, with a symmetrical trapezoidal cross-section that is wider at the top and narrower at the bottom, forming a stable guide channel. The working surface of the guide rail 50 is precision-machined to ensure a perfect fit with the sliding components. Clear scale markings can be provided on the side of the guide rail 50. The scale is made of wear-resistant material and includes main and auxiliary scale lines, facilitating precise control of the upper template's movement distance by the operator. A detachable limiting block is installed at each end of the guide rail 50, and this limiting block is fixed to a preset mounting position on the guide rail by fastening bolts. The limiting block is made of high-strength engineering plastic, and its contact surface has a buffer pad, which effectively prevents excessive sliding of the upper template and avoids rigid collisions between metal components. The position of each limiting block can be adjusted along the length of the guide rail according to actual needs, thereby flexibly setting the safe sliding range of the upper template.

[0056] In the above embodiments, the trapezoidal concave structure design provides better guiding stability and effectively prevents deviation during the sliding process; the surface scale markings enable precise control of the moving distance; and the adjustable limit block ensures operational safety while adapting to the production needs of drawer units of different specifications, thus improving the accuracy and efficiency of cable prefabrication.

[0057] In one exemplary embodiment, the mounting plate 40 has an L-shaped bent structure and is bolted to the lower template 20.

[0058] For example, the mounting plate 40 adopts an L-shaped bending structure design and is integrally formed through precision sheet metal processing. The vertical bending part of the mounting plate 40 forms a stable right-angle connection with the horizontal support part, and the bending point is rounded to avoid stress concentration. The overall structure has excellent rigidity and deformation resistance. The mounting plate 40 can be made of high-quality cold-rolled steel plate with rust-proof treatment to ensure long-term durability. The mounting plate 40 is connected to the lower template 20 using a standardized bolt fixing method. Mounting holes are provided at the edge of the lower template 20, which precisely match the corresponding holes on the mounting plate 40. The connecting bolts can adopt an internal hexagonal cylindrical head structure and be used with elastic washers, which not only ensures the firmness of the connection but also facilitates disassembly operations during later maintenance.

[0059] In the above embodiments, the arc transition at the 40-degree bend of the mounting plate of the L-shaped bending structure avoids stress concentration; the horizontal support part is provided with a reinforcing rib structure to further improve the load-bearing capacity; the vertical bending part can be reserved with a guide rail installation interface to facilitate the modular assembly of subsequent components, simplify the manufacturing process, improve the structural stability of the workbench, and provide a reliable support platform for cable prefabrication.

[0060] In one exemplary embodiment, the surface of the positioning post 30 is fitted with an insulating heat-shrink tubing.

[0061] For example, the surface of the positioning post 30 can adopt a double-layer insulation protection design. A high-performance heat-shrink tubing is tightly fitted onto the outer surface of the main metal rod of the positioning post 30. This tubing is made of flame-retardant polyolefin material, possessing excellent electrical insulation performance and mechanical strength. After high-temperature heat shrinking treatment, the heat-shrink tubing forms a tight fit with the post surface, ensuring that it will not shift or loosen during use. The outer surface of the heat-shrink tubing can also be provided with anti-slip textures, formed by integral molding into a uniformly distributed diamond-shaped raised pattern. The anti-slip texture design increases the friction when fixing the cable and prevents cable displacement caused by an overly smooth surface. The ends of the heat-shrink tubing are treated with a heat-melt sealing process to ensure smooth edges and prevent damage to the cable insulation layer. The color of the insulating heat-shrink tubing can be selected according to standard color codes for different voltage levels, such as black for primary circuits and red for secondary control circuits, facilitating on-site identification and management. This meets electrical safety requirements and improves the standardization and visual management level of cable prefabrication work.

[0062] In the above embodiments, the insulation design of the positioning support 30 can effectively prevent accidental short circuits during cable laying, avoid wear of the cable insulation layer by the metal support, improve operational safety, reduce the risk of electric shock, adapt to the fixing requirements of cables of different specifications, facilitate cleaning and maintenance, and extend the service life of the prefabricated workbench.

[0063] In an exemplary embodiment, the bottom of the lower template 20 is provided with a fixing device for fixing the lower template 20 to the workbench.

[0064] For example, the bottom of the lower template 20 is equipped with a modular quick-fixing device to achieve efficient installation and precise positioning of the workbench. This fixing device can adopt a modular design, with quick-clamping mechanisms symmetrically distributed at the four corners, combined with an auxiliary positioning system consisting of a central reference positioning pin. This ensures stability during cable prefabrication and facilitates quick disassembly for routine maintenance. The fixing device can also be a mobile platform to facilitate the movement of the prefabrication workbench.

[0065] In one exemplary embodiment, the present invention also provides a low-voltage cabinet drawer unit primary and secondary cable prefabrication system, including the low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench as described in any of the first aspect embodiments above.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A prefabrication workbench for primary and secondary cables of a low-voltage switchgear drawer unit, characterized in that, include: The workbench includes an upper template and a lower template arranged perpendicularly to each other, and the surfaces of the upper template and the lower template are provided with a plurality of positioning holes. A positioning support is provided at the positioning hole, and the positioning support positions the cable through the positioning hole; The mounting plate is connected to the upper template and the lower template respectively; Guide rails are provided on both sides of the lower template. The guide rails support the upper template through the mounting plate, and the upper template can slide along the guide rails.

2. The low-voltage switchgear drawer unit primary and secondary cable prefabrication workbench according to claim 1, characterized in that, The workbench also includes: A pressure block is disposed between the mounting plate and the guide rail to fix the position of the guide rail.

3. The low-voltage switchgear drawer unit primary and secondary cable prefabrication workbench according to claim 1, characterized in that, The plurality of positioning holes are multiple equidistant positioning holes for flat-head hexagonal nuts.

4. The low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench according to claim 3, characterized in that, The positioning support includes a threaded rod and a hexagonal nut. The height of the threaded rod is adjustable, and the positioning support is threadedly connected to the positioning hole of the flat-head hexagonal nut.

5. The low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench according to claim 3, characterized in that, The positioning holes of the flat-head hexagonal nuts are arranged in a matrix, and the spacing of the positioning holes of the flat-head hexagonal nuts is set to the standard modular size of the low-voltage switchgear.

6. The low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench according to claim 1, characterized in that, The guide rail has a trapezoidal concave structure, the surface of the guide rail is marked with scale marks, and a limit block is provided at the end of the guide rail to limit the sliding distance of the upper template on the guide rail.

7. The low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench according to claim 1, characterized in that, The mounting plate has an L-shaped bent structure and is bolted to the lower template.

8. The low-voltage switchgear drawer unit primary and secondary cable prefabrication workbench according to claim 1, characterized in that, The surface of the positioning support is covered with an insulating heat shrink tubing sleeve.

9. The low-voltage switchgear drawer unit primary and secondary cable prefabrication workbench according to claim 1, characterized in that, The bottom of the lower template is provided with a fixing device for fixing the lower template to the workbench.

10. A prefabrication system for primary and secondary cables in a low-voltage cabinet drawer unit, characterized in that, The low-voltage cabinet drawer unit primary and secondary cable prefabrication workbench as described in any one of claims 1-9.

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