Buckle type metal wiring duct using prefabricated holes

Abstract

The utility model relates to the field of cable installation structures, in particular to a buckle type metal wiring duct using prefabricated holes. The wiring groove comprises a wiring groove box and a groove box cover, the wiring duct box comprises a U-shaped box body and two buckle bearing plate parts connected to the two ends of the box body respectively, the buckle bearing plate parts protrude outwards, two first hole sets, two second hole sets and a third hole set are formed in the box body, each hole set comprises a plurality of arc-shaped cutting seams which are coaxially distributed, and a hole core plate part which can be knocked off is formed on the inner side of each hole set. The groove box cover comprises a cover plate part and two buckle plate parts connected to the two ends of the cover plate part respectively, and the buckle plate parts protrude outwards and are connected with the buckle bearing plate parts in a buckled mode. According to the utility model, the standardization degree is high, the production efficiency is high, the capability of dealing with temporary change requirements is strong, and the installation time and cost are saved.

Description

Technical Field

[0001] This utility model relates to the field of cable installation structures, and in particular to a snap-fit ​​metal cable trough using pre-drilled holes. Background Technology

[0002] Combined electrical equipment (GEO) is a key component of power systems. With the increasing number of GEOs, the demands for ease of installation and reusability of the metal cable trays on these GEOs are also rising. Furthermore, with the increasing requirements for the reliability and stability of GEOs, the application of intelligent online monitoring systems is also growing. Commonly used online monitoring systems include remote gas density monitoring systems, micro-water online monitoring systems, and partial discharge online monitoring systems. These systems all require uploading the collected data via signal cables, necessitating the special design of cable outlets in the cable trays of the GEOs for these online monitoring systems. Moreover, the specific applications of online monitoring vary across different engineering projects.

[0003] Currently, the metal cable trays in modular electrical appliances use an "on-demand" design, meaning the cable outlet holes are drilled according to actual needs, and these holes are through holes. This "on-demand" cable tray design has the following drawbacks:

[0004] 1. Low standardization and low production efficiency: The on-demand opening design results in simple openings for the wiring ducts, a wide variety of parts, and low standardization; the wiring ducts are non-standard customized, leading to low production efficiency. For example... Figures 3-6 As shown, the gas chamber of the combined electrical appliance requires four different wiring trough designs with different opening schemes under the following four different operating conditions: ① Operating condition with a conventional airtight controller: requires one φ24mm through hole (first through hole); ② Operating condition with a remote airtight controller: requires one φ24mm through hole (first through hole) and one φ20mm through hole (second through hole); ③ Operating condition with a conventional airtight controller with a micro-moisture density monitoring sensor: requires two φ24mm through holes (first through hole); ④ Operating condition with a remote airtight controller with a micro-moisture density monitoring sensor: requires two φ24mm through holes (first through hole) and one φ20mm through hole (second through hole). If the gas chamber low-temperature heating device and the gas chamber partial discharge monitoring sensor are added, the number of wiring trough types required will be even greater.

[0005] 2. Insufficient adaptability: If the working conditions of the project change temporarily after the cable tray is installed, the cable tray needs to have additional or reduced openings. Due to the hardness of the metal cable tray, it is difficult to add openings and there is a risk of scratching the internal cables.

[0006] 3. Installation is time-consuming and costly: such as Figure 1 and Figure 2As shown, both the cable tray and the cover are designed with connection holes. Fasteners are passed through the connection holes for connection. The fasteners are screws or rivets. During installation and disassembly, the fasteners may damage the cables inside the cable tray, which is not conducive to the maintenance and replacement of cables on site. Utility Model Content

[0007] The purpose of this utility model is to address the problems existing in the background technology by proposing a snap-fit ​​metal cable tray with prefabricated openings, which has a high degree of standardization, high production efficiency, strong ability to meet temporary change requirements, and saves installation time and costs.

[0008] The technical solution of this utility model is a snap-fit ​​metal cable tray using pre-fabricated openings, including a cable tray box and a tray box cover; the cable tray box includes a U-shaped box body and two fastening plates respectively connected to both ends of the box body, the fastening plates protruding outwards, the box body having two sets of first holes, two sets of second holes and one set of third holes, each set of holes including multiple coaxially distributed arc-shaped cuts, and a core plate that can be knocked off is formed on the inner side of each set of holes; the tray box cover includes a cover plate and two snap-fit ​​plates respectively connected to both ends of the cover plate, the snap-fit ​​plates protruding outwards and snap-fitted to the fastening plates.

[0009] Preferably, the bottom width of the box is smaller than the top width, and the cover plate has a straight plate structure.

[0010] Preferably, both the receiving plate portion and the buckle plate portion are "V" shaped plate structures.

[0011] Preferably, the first hole group includes three first cutting slits coaxially distributed, the second hole group includes three second cutting slits coaxially distributed, and the third hole group includes three third cutting slits coaxially distributed.

[0012] Preferably, the diameter of the first cutting slit is 24 mm, the diameter of the second cutting slit is 20 mm, and the diameter of the third cutting slit is 36 mm.

[0013] Compared with the prior art, the present invention has the following beneficial technical effects:

[0014] This utility model boasts a high degree of standardization and production efficiency. It features pre-fabricated modular hole groups on the cable tray box, with the core plate portion at the corresponding hole group being knocked off according to usage requirements. Cable trays utilizing this modular opening scheme cover various engineering applications, including conventional airtight controllers, remote airtight controllers, micro-moisture density monitoring, air chambers with low-temperature heating devices, and partial discharge online monitoring. It also exhibits strong capability to handle temporary changes. The snap-fit ​​connection and disassembly are achieved directly using the structure of the cable tray box and its cover, saving installation time and costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an existing metal slot box structure;

[0016] Figure 2 for Figure 1 Exploded view of the structure;

[0017] Figure 3 The existing slot opening solution is suitable for conventional airtight controller operating conditions;

[0018] Figure 4 The existing slot opening solution is suitable for the operating conditions of remote control devices;

[0019] Figure 5 For existing slot opening solutions suitable for conventional water density sensors with micro-water density sensors;

[0020] Figure 6 The existing slot opening solution is suitable for remote control devices with micro water density sensors.

[0021] Figure 7 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0022] Figure 8 for Figure 7 Exploded view of the structure;

[0023] Figure 9 A schematic diagram showing the structure of simultaneously pre-cutting the first, second, and third cutting slits on the line slot box;

[0024] Figure 10 for Figure 9 Enlarged view of the structure at point A in the middle.

[0025] Reference numerals: 1. Groove box; 101. First cutting seam; 102. Second cutting seam; 103. Third cutting seam; 11. Buckle plate part; 2. Groove box cover; 21. Buckle plate part; 3. Groove box; 301. First through hole; 302. Second through hole; 4. Box cover; 5. Fastener. Detailed Implementation

[0026] like Figures 7-10 As shown, this embodiment proposes a snap-fit ​​metal cable tray with pre-fabricated openings, including a cable tray box 1 and a box cover 2, which are made of metal sheet with a certain degree of elasticity.

[0027] The cable tray 1 includes a U-shaped body and two retaining plates 11 connected to both ends of the body. The bottom width of the body is smaller than the top width to facilitate cable insertion. The retaining plates 11 protrude outwards. The body has two sets of first holes, two sets of second holes, and one set of third holes. Each set of holes includes multiple coaxially distributed arc-shaped cuts. The inner side of each set of holes forms a core plate that can be knocked off. The cable tray 1 is cut in sections using laser cutting, retaining the connection points (connecting strips) between the core plate and the main body of the cable tray 1, so that the core plate and the main body of the cable tray 1 are in a semi-connected state, which can be knocked off when needed. Specifically, the distance between the ends of adjacent arc-shaped cuts is short, leaving connecting strips for connecting the main body of the cable tray 1 and the core plate, making it easy to knock off the core plate. After the connecting strip breaks and the core plate is knocked off, a cable outlet hole is left on the cable tray 1.

[0028] The first hole group includes three coaxially distributed first cutting slits 101, the second hole group includes three coaxially distributed second cutting slits 102, and the third hole group includes three coaxially distributed third cutting slits 103. The diameter of the first cutting slit 101 is 24mm, the diameter of the second cutting slit 102 is 20mm, and the diameter of the third cutting slit 103 is 36mm. All these diameters are the outer diameters of the arc-shaped cutting slits, which are the diameters of the cable outlet holes left on the cable tray box 1 after the core plate is knocked off. After the cable tray is installed, according to the actual working conditions, the core plates of the cable outlet holes to be used are knocked off using tools; the core plates of unused holes do not need to be knocked off. If the gas chamber of the combined electrical appliance operates with a remote control unit equipped with a micro-moisture density monitoring sensor, then only two φ24mm pre-drilled holes and one φ20mm pre-drilled hole need to be removed; other holes remain unremoved. If the gas chamber of the combined electrical appliance operates with a conventional control unit equipped with a low-temperature heating device and a partial discharge monitoring sensor, then one φ24mm pre-drilled hole, one φ20mm hole, and one φ36mm pre-drilled hole need to be removed; other holes remain unremoved. In other operating conditions, pre-drilled holes can be removed as needed. Using a pre-fabricated combined opening scheme in the cable trays improves design and manufacturing efficiency while ensuring ease of modification of the application scheme on-site.

[0029] The slot cover 2 includes a cover plate portion and two snap-on portions 21 respectively connected to both ends of the cover plate portion. The cover plate portion has a straight plate structure. Both the snap-on portion 11 and the snap-on portion 21 have a "V" shaped plate structure. The snap-on portion 21 protrudes outward and is snapped into the snap-on portion 11. Specifically, the snap-on portion 21 snaps onto the outside of the snap-on portion 11. There is no need to open connection holes for fasteners on the slot box 1 and the slot cover 2, nor is it necessary to use fasteners. Instead, the snap-on connection and disassembly are achieved using the structure of the slot box 1 and the slot cover 2 themselves.

[0030] This embodiment boasts a high degree of standardization and production efficiency. Pre-fabricated modular hole groups are installed on the cable tray box 1, and the corresponding hole core plates are removed according to usage requirements. Cable trays utilizing this modular opening scheme cover various engineering applications, including conventional airlock controllers, remote airlock controllers, micro-moisture density monitoring, air chambers with low-temperature heating devices, and partial discharge online monitoring. It exhibits strong capability to handle temporary changes. If the design changes after the cable tray installation, for example, from a conventional airlock controller to a remote airlock controller, only the φ20mm pre-fabricated holes need to be removed, eliminating the need for drilling tools and saving significant manpower and resources. It easily adapts to various design changes. The cable tray box 1 and its cover 2 utilize their own structure for snap-fit ​​connection and disassembly, saving installation time and costs.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A pre-punched snap-in metal trunking, characterized by, include: The line slot box (1) includes a U-shaped box body and two fastening plate parts (11) respectively connected to both ends of the box body. The fastening plate parts (11) protrude outward. The box body is provided with two sets of first hole groups, two sets of second hole groups and one set of third hole groups. Each set of hole groups includes multiple coaxially distributed arc-shaped cutting slits. The inner side of each set of hole groups forms a hole core plate part that can be knocked off. The slot cover (2) includes a cover plate portion and two snap-on portions (21) respectively connected to both ends of the cover plate portion. The snap-on portions (21) protrude outward and are snapped together with the snap-on portion (11).

2. A snap-in metal trunking with preformed openings according to claim 1, characterized in that, The bottom width of the box is smaller than the top width, and the cover is a straight plate structure.

3. A snap-fit ​​metal cable tray with pre-fabricated openings according to claim 1, characterized in that, Both the fastening plate part (11) and the fastening plate part (21) are "V" shaped plate structures.

4. A snap-fit ​​metal cable tray with pre-fabricated openings according to claim 1, characterized in that, The first hole group includes three coaxially distributed first cutting slits (101), the second hole group includes three coaxially distributed second cutting slits (102), and the third hole group includes three coaxially distributed third cutting slits (103).

5. A snap-fit ​​metal cable tray with pre-fabricated openings according to claim 4, characterized in that, The diameter of the first cutting slit (101) is 24 mm, the diameter of the second cutting slit (102) is 20 mm, and the diameter of the third cutting slit (103) is 36 mm.

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