Split electric box for modular building

Abstract

The utility model relates to the field of modular buildings, in particular to a split electric box for a modular building. The split electric box comprises a box frame with a fixed thickness and a box with a customized thickness, the box frame is of a frame-shaped structure with openings in the front end and the rear end and can be pre-embedded in a thin-shell wall of a modular building wall, the box is a box body with an opening in the front end, and the front end of the box is detachably connected with the rear end of the box frame to form a main body structure of the split electric box. According to the electric box with the structure, the box frame part has universality, the box frame part can be integrated into a thin wall of a modular building, on-site hoisting and module splicing are not affected, and the box with the customized thickness can meet different requirements for the overall thickness of the electric box in the actual production process; only the box part with the customized thickness needs to be fixed to the box frame during field assembly, installation is convenient, and time and labor are saved.

Description

Technical Field

[0001] This utility model relates to the field of modular buildings, and in particular to a split electrical box for modular buildings. Background Technology

[0002] Modular building assembly represents a significant revolution in construction, breaking down building, structure, and electromechanical systems into individual small modules. These modules can be mass-produced in factories, achieving high integration and precision. Once produced, the modules are transported to the site for hoisting, completing the building's construction. Compared to traditional construction methods, this significantly shortens construction time, reduces carbon emissions, minimizes on-site noise and dust, and lowers the risk factor during construction. However, prefabricated building modules require on-site hoisting and assembly. The shear walls of modular buildings typically consist of prefabricated thin-shell walls and cast-in-place walls. Traditional electrical boxes are generally 100mm-120mm thick, while prefabricated thin-shell walls are 20mm-50mm thick. Therefore, the prefabricated thin-shell walls cannot provide sufficient space for traditional electrical boxes. Drilling holes or grooves in the thin-shell walls may affect the structure's load-bearing capacity, requiring additional reinforcement, increasing construction difficulty and efficiency. Conversely, pre-embedding excessively thick electrical boxes will cause the protruding portion to hinder on-site hoisting and module assembly. Meanwhile, traditional electrical boxes are all of a fixed thickness. However, in actual construction, the thickness requirements of electrical boxes vary depending on the wall thickness and the installation location, resulting in poor versatility.

[0003] Therefore, there is an urgent need for an electrical box that can ensure the strength of the precast thin-shell wall itself while meeting the requirements for the total thickness of the electrical box, without affecting on-site hoisting and module splicing, and also take into account versatility as much as possible. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a split electrical box for modular buildings, which solves the problems of poor versatility of traditional electrical boxes, the inability to be pre-embedded in the prefabricated thin-shell walls of modular buildings, and the impact of opening holes or slots in the prefabricated thin-shell walls on strength.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides a split electrical box for modular buildings. It includes a frame of fixed thickness and a box housing of customized thickness. The frame is a frame-type structure with openings at both the front and rear ends, and can be pre-embedded in the thin-shell wall of the modular building. After embedding, the front end of the frame is flush with the interior side of the thin-shell wall, and the rear end protrudes from the exterior side of the thin-shell wall. The box housing is a box body with an open front end, and the front end of the box housing is detachably connected to the rear end of the frame, forming the main structure of the split electrical box.

[0008] Optionally, the rear end face of the box frame has an annular retaining edge, and the upper and lower end faces of the box opening side both have outward first flanges that can be engaged with the annular retaining edge.

[0009] Optionally, it also includes a U-shaped guide rail for installing electrical components. The width and depth dimensions of the U-shaped guide rail are adapted to the width and depth dimensions of the inner side of the split electrical box. Both free ends of the U-shaped guide rail have outward second flanges. Its main body is embedded inside the box frame and is detachably connected to the front end face of the two sides of the box frame through the two second flanges.

[0010] Optionally, a first threaded hole is provided on the front face of both sides of the box frame, and a key hole that matches the first threaded hole is provided on both second flanges. The U-shaped guide rail is fixed to the box frame by passing a bolt through the key hole and connecting it to the first threaded hole.

[0011] Optionally, an L-shaped connecting plate is provided at the left and right ends of the U-shaped guide rail near the box, and the openings of the two L-shaped connecting plates are arranged opposite each other. The horizontal plate of the L-shaped connecting plate is detachably connected to the U-shaped guide rail, and the free end of the vertical plate abuts against the inner wall of the box. The length of the vertical plate can be adjusted to accommodate boxes of different thicknesses.

[0012] Optionally, it also includes a face cover, which has round holes at both ends. The two second flanges of the U-shaped guide rail have second threaded holes that are adapted to the round holes. The face cover is fixed to the U-shaped guide rail at the positions of the round holes using bolts.

[0013] Optionally, the upper surface of the box frame is provided with a flat oval opening for connecting the inlet pipe, which is used to connect to the pipe with a flat oval cross-section.

[0014] Optionally, a terminal block is pre-installed on the top inner side of the enclosure frame, and grounding wires are pre-installed on the inner walls of the enclosure frame and the enclosure box.

[0015] Optionally, the thickness of the frame is between 50mm and 60mm, the thickness of the box is between 10mm and 50mm, and the overall thickness of the connected frame and box is between 60mm and 100mm.

[0016] Optionally, both the inner and outer surfaces of the box frame and the box box are coated with electrostatic powder coating.

[0017] (III) Beneficial Effects

[0018] The beneficial effects of this utility model are:

[0019] This utility model discloses a split electrical box for modular buildings. The box comprises two parts: a frame of fixed thickness and a box housing of customized thickness. The frame is versatile and can be pre-embedded in the thin-shell walls of modular buildings, resulting in higher integration and avoiding the impact on strength caused by drilling or slotting in the thin-shell walls. Furthermore, the frame thickness is significantly less than that of traditional electrical boxes, and pre-embedding does not affect on-site hoisting and module assembly. By customizing box housings of different thicknesses, the different overall thickness requirements of the electrical box during actual production can be met. On-site assembly simply requires pushing the customized box housing into the frame for fixation, making installation convenient, time-saving, and labor-saving. Attached Figure Description

[0020] Figure 1 This is a front view of embodiment 1 of the modular electrical box of this utility model;

[0021] Figure 2 for Figure 1 Side view of the split electrical box in the middle;

[0022] Figure 3 for Figure 1 A top view of the split electrical box in the middle;

[0023] Figure 4 for Figure 1 The main view of the split electrical box frame in the middle;

[0024] Figure 5 for Figure 4 Side view of the box frame in the middle;

[0025] Figure 6 for Figure 4 Top view of the box frame;

[0026] Figure 7 for Figure 1 Front view of the split electrical box enclosure;

[0027] Figure 8 for Figure 7 A side view of the box in the middle;

[0028] Figure 9 for Figure 7 A top view of the box in the middle;

[0029] Figure 10 for Figure 1 A front view of the U-shaped guide rail with an L-shaped connecting plate in the split electrical box;

[0030] Figure 11 for Figure 10 A top view of the U-shaped guide rail with an L-shaped connecting plate.

[0031] Figure 12 for Figure 1 Front view of the split electrical box cover;

[0032] Figure 13 for Figure 1 A top view of the U-shaped guide rail with an L-shaped connecting plate in the split electrical box, showing its contact with the box.

[0033] Figure 14 This is a top view of a second embodiment of a split electrical box for modular buildings according to the present invention;

[0034] Figure 15 This is a connection diagram of embodiment 3 of the split electrical box for modular buildings according to the present invention;

[0035] Figure 16 This is a connection diagram of embodiment 4 of the present invention, which is a split electrical box for modular buildings.

[0036] [Explanation of Labels in the Attached Image]

[0037] 1: Box frame; 11: Annular retaining edge; 12: First threaded hole; 13: Circular opening; 14: Flat oval opening;

[0038] 2: Box; 21: First flange; 22: Buckle; 23: Third flange;

[0039] 3: U-shaped guide rail; 31: Second flange; 32: Keyhole; 33: L-shaped connecting plate; 331: Horizontal plate; 332: Vertical plate; 34: Second threaded hole; 35: Slot;

[0040] 4: Faceplate; 41: Round hole; 42: Viewing window;

[0041] 5: Terminal block;

[0042] 6: Grounding wire;

[0043] 7: Installation block;

[0044] 8: Wire thread insert;

[0045] 9: Install bolts;

[0046] 10: Adjustment pad. Detailed Implementation

[0047] To better explain and facilitate understanding of this utility model, a detailed description of its specific embodiments is provided below with reference to the accompanying drawings. In this document, directional terms such as "upper," "lower," "left," and "right" are used interchangeably. Figure 2 The orientation is used as a reference.

[0048] This utility model proposes a split electrical box for modular buildings. The box comprises two parts: a frame of fixed thickness and a box housing of customized thickness. The frame is versatile and can be pre-embedded in the thin-shell walls of modular buildings, resulting in higher integration and avoiding the impact on strength caused by drilling or slotting in the thin-shell walls. Furthermore, the frame thickness is significantly less than that of traditional electrical boxes, and pre-embedding does not affect on-site hoisting and module assembly. By customizing boxes of different thicknesses, the different overall thickness requirements of the electrical box during actual production can be met. On-site assembly simply requires pushing the customized box housing into the frame for fixation, making installation convenient, time-saving, and labor-saving.

[0049] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0050] Example 1:

[0051] Reference Figures 1 to 3 The embodiment shown here is a split electrical box for modular buildings, which includes a box frame 1 of fixed thickness, a box 2 of customized thickness, a U-shaped guide rail 3, a cover 4, a terminal block 5 and a grounding wire 6 (in the following description, the end of the electrical box facing indoors is the front section, that is, the end connected to the cover is the front section, and the end away from indoors is the rear section).

[0052] Among them, such as Figures 4 to 6 As shown, the box frame 1 is a frame structure with openings at both the front and rear ends. The rear end face has an annular retaining edge 11, which can be pre-embedded in the thin-shell wall of a modular building. After embedding, the front end face of the box frame 1 is flush with the interior side of the thin-shell wall, and the rear end face of the box frame 1 protrudes from the exterior side of the thin-shell wall. Furthermore, the front end faces of both sides of the box frame 1 are provided with first threaded holes 12. Figures 7 to 9 As shown, box 2 is a box with an open front end. Both the upper and lower surfaces of the open side have outward-facing first flanges 21. The front end (i.e., the open side) of box 2 is detachably connected to the rear end of box frame 1. Figure 12 As shown, the cover 4 has a viewing window 42 in the middle and round holes 41 at both ends, which are detachably connected to the front end of the frame 1. The frame 1, the box 2, and the cover 4 are cleverly connected by U-shaped guide rails 3 for installing electrical components, specifically, as shown... Figure 10 and Figure 11As shown, the width and depth of the U-shaped guide rail 3 are adapted to the width and depth of the inner side of the split electrical box. Both free ends of the U-shaped guide rail 3 have outward-facing second flanges 31. Each of the two second flanges 31 has a keyhole 32 that matches the first threaded hole 12 on the box frame 1 and a second threaded hole 34 that matches the round hole 41 on the faceplate 4. The U-shaped guide rail 3 itself can be as follows: Figure 11 The split structure shown can also be a one-piece structure. Furthermore, an L-shaped connecting plate 33 is provided at the left and right ends of the U-shaped guide rail 3 near the box 2, and the openings of the two L-shaped connecting plates 33 are arranged opposite each other. The horizontal plate 331 of the L-shaped connecting plate 33 is attached to the back of the U-shaped guide rail 3 (i.e. the side near the box 2), and the two are detachably connected by fasteners. The free end of the vertical plate 332 extends toward the box 2 and abuts against the inner wall of the box 2. The length of the vertical plate 332 can be adjusted to accommodate boxes 2 of different thicknesses.

[0053] During assembly, box 2 is pushed in from the front end of box frame 1, and the first flange 21 on box 2 is snapped onto the annular snap edge 11 of box frame 1 for initial positioning. Then, the L-shaped connecting plate 33, customized according to the thickness of box 2, is pre-installed onto the U-shaped guide rail 3, and pushed into the separate electrical box along with the U-shaped guide rail 3. During pushing, the open end of the U-shaped guide rail 3 faces the direction of box frame 1, and the opposite side of the open end faces the direction of box 2, until the vertical plate 332 of the L-shaped connecting plate 33 abuts against the inner wall of box 2, indicating that it is in place (e.g., ...). Figure 13 The box 2 is then further secured by the vertical plate 332 of the L-shaped connecting plate 33. At this time, the two second flanges 31 on the U-shaped guide rail 3 are also in contact with the front ends of both sides of the box frame 1. The vertical position of the U-shaped guide rail 3 is slightly adjusted so that the keyhole 32 on it is aligned with the first threaded hole 12 on the box frame 1, and then it is fixed with bolts. When it is necessary to install the cover 4, simply align the round hole 41 on the cover 4 with the second threaded hole 34 on the U-shaped guide rail 3, and then fix it with bolts.

[0054] In this embodiment, the first flange 21 on the box 2 not only serves as a limiting element for installation but also further ensures the sealing performance after the box 2 is connected to the box frame 1. The keyhole 32 is provided at the connection point between the U-shaped guide rail 3 and the box frame 1 to simultaneously accommodate the connection at both ends. This ensures that the L-shaped connecting plate 33 mounted on the U-shaped guide rail 3 can fully abut against the box 2, while preventing the mounting holes on the U-shaped guide rail 3 from malfunctioning due to vertical positional errors, thus avoiding misalignment between the mounting holes and the first threaded hole 12 on the box frame 1, which would prevent the two from connecting.

[0055] In practical applications, the box frame 1 is relatively small in size and versatile. It can be pre-embedded in the thin-shell wall of the modular building, improving the integration of the modular building without affecting subsequent on-site hoisting and module assembly. It also avoids the need to drill holes or cut grooves in the thin-shell wall if the entire electrical box is installed on-site, which would affect the wall strength and thus the overall support of the wall. After the module assembly is completed on-site, the thickness of the box 2 and the length of the vertical plate 332 on the L-shaped connecting plate 33 are customized according to the actual requirements of the overall thickness of the electrical box. Then, the box 2, U-shaped guide rail 3, cover 4 and electrical components are installed, which is very convenient and saves time and effort.

[0056] In this embodiment, the thickness of the frame 1 is between 50mm and 60mm, and the thickness of the box 2 is selected between 10mm and 50mm. The overall thickness of the connected frame 1 and box 2 is between 60mm and 100mm. A terminal block 5 is pre-installed on the inner top of the frame 1, and a grounding wire 6 is pre-installed on the inner sidewalls of both the frame 1 and box 2. The interface for connecting the inlet pipe on the upper surface of the frame 1 is the same as that of a traditional electrical box, a circular opening 13. Of course, this is not a limitation; those skilled in the art can set the dimensions of the general-purpose frame 1 and the customizable box 2 according to actual needs. It should be noted that because there is a series of connections between the frame 1 and box 2, the overall thickness of the split electrical box is not simply equal to the sum of the thicknesses of the frame 1 and box 2. Specific details regarding the assembly allowance are common knowledge to those skilled in the art and will not be elaborated here. Furthermore, to improve the product's corrosion resistance, wear resistance, aesthetics, and service life, both the inner and outer surfaces of the frame 1 and box 2 are coated with electrostatic powder coating.

[0057] Example 2:

[0058] Reference Figure 14 The present embodiment shows a split electrical box for modular buildings. The difference between this embodiment and embodiment 1 is that the interface on the upper surface of the box frame 1 for connecting the inlet pipe is a flat oval opening 14, which can be connected to the pipe with a flat oval cross section. The other parts are the same as in embodiment 1, and will not be described again here.

[0059] Example 3:

[0060] Reference Figure 15 The present embodiment shows a split electrical box for modular buildings. The difference between it and embodiment 1 is that the connection structure between the box frame 1 and the box 2 is different. All other parts are the same as those in embodiment 1, and will not be described again here.

[0061] Specifically, instead of installing an L-shaped connecting plate 33 on the U-shaped guide rail 3, buckles 22 are set on the left and right side walls of the box 2 near the opening. On the two side walls of the U-shaped guide rail 3 near the bottom, slots 35 that are adapted to the buckles 22 are set. The buckles 22 are engaged with the slots 35 to fix the box 2 and the box frame 1 through the U-shaped guide rail 3.

[0062] During assembly, the box 2 is pushed in from the front end of the box frame 1, and the first flange 21 on the box 2 is snapped onto the annular snap edge 11 of the box frame 1 to complete the initial positioning. Then, the main body of the U-shaped guide rail 3 is embedded into the box frame 1, and the buckle 22 on the box 2 is snapped onto the slot 35 on the U-shaped guide rail 3. The two second flanges 31 on the U-shaped guide rail 3 are further aligned with the first threaded hole 12 on the box frame 1 through the key hole 32 and fixed with bolts.

[0063] Meanwhile, the interface on the upper end of the box frame 1 of the split electrical box shown in this embodiment for connecting the inlet pipe can adopt a traditional circular opening like in Embodiment 1, or a flat oval opening like in Embodiment 2.

[0064] Example 4:

[0065] Reference Figure 16 The present embodiment shows a split electrical box for modular buildings. The difference between it and embodiment 1 is that the connection structure between the box frame 1 and the box 2 is different. All other parts are the same as those in embodiment 1, and will not be described again here.

[0066] Specifically, mounting blocks 7 are fixedly connected to both sides of the annular retaining edge 11 of the box frame 1. Steel wire thread sleeves 8 are pre-embedded on the mounting blocks 7. The two side walls at the rear end of the box 2 have third flanges 23 with mounting holes that are adapted to the position of the mounting blocks 7. Multiple sets of mounting blocks 7 and third flanges 23 can be set on both sides to ensure connection strength.

[0067] During assembly, the box 2 is pushed in from the front end of the box frame 1, and the first flange 21 on the box 2 is snapped onto the annular snap edge 11 of the box frame 1 to complete the initial positioning. An adjusting pad 10 is added between the third flange 23 and the mounting block 7 to eliminate the gap between them, and then the mounting bolts 9 are used for fixing.

[0068] This connection structure avoids multiple interconnection methods between the box frame 1, box 2, and U-shaped guide rail 3, which can reduce installation difficulties caused by installation errors.

[0069] Meanwhile, the interface on the upper end of the box frame 1 of the split electrical box shown in this embodiment for connecting the inlet pipe can adopt a traditional circular opening like in Embodiment 1, or a flat oval opening like in Embodiment 2.

[0070] In the description of this utility model, it should be understood that 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0071] 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0072] 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 indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A split electrical box for modular buildings, characterized in that, Includes a fixed thickness box frame (1) and a custom thickness box (2); The box frame (1) is a frame structure with openings at both the front and rear ends, and can be pre-embedded in the thin shell wall of the modular building wall. After being embedded, the front end of the box frame (1) is flush with the indoor side of the thin shell wall, and the rear end of the box frame (1) protrudes from the outdoor side of the thin shell wall. The box (2) is a box with an open front end. The front end of the box (2) is detachably connected to the rear end of the box frame (1) to form the main structure of the split electrical box.

2. A split electrical box for modular buildings as described in claim 1, characterized in that: The rear end face of the box frame (1) has an annular retaining edge (11), and the upper and lower end faces of the box box (2) on the opening side both have outward first flanges (21), which can be engaged with the annular retaining edge (11).

3. A split electrical box for modular buildings as described in claim 1, characterized in that: It also includes a U-shaped guide rail (3) for installing electrical components. The width and depth of the U-shaped guide rail (3) are adapted to the width and depth of the inner side of the split electrical box. The two free ends of the U-shaped guide rail (3) are each equipped with an outward second flange (31). Its main body is embedded inside the box frame (1) and is detachably connected to the front end face of the two sides of the box frame (1) through the two second flanges (31).

4. A split electrical box for modular buildings as described in claim 3, characterized in that: The front face of both sides of the box frame (1) is provided with a first threaded hole (12), and the two second flanges (31) are provided with a key hole (32) that matches the first threaded hole (12). The U-shaped guide rail (3) is fixed to the box frame (1) by passing a bolt through the key hole (32) and connecting it to the first threaded hole (12).

5. A split electrical box for modular buildings as described in claim 3, characterized in that: The U-shaped guide rail (3) is provided with an L-shaped connecting plate (33) at the left and right ends of the side close to the box (2), and the openings of the two L-shaped connecting plates (33) are arranged opposite to each other. The horizontal plate (331) of the L-shaped connecting plate (33) is detachably connected to the U-shaped guide rail (3), and the free end of the vertical plate (332) abuts against the inner wall of the box (2). The length of the vertical plate (332) can be adjusted to accommodate boxes (2) of different thicknesses.

6. A split electrical box for modular buildings as described in claim 3, characterized in that: It also includes a face cover (4), which has round holes (41) at both ends. The two second flanges (31) of the U-shaped guide rail (3) are provided with second threaded holes (34) that are adapted to the round holes (41). The face cover (4) and the U-shaped guide rail (3) are fixed with bolts at the positions of the round holes (41).

7. A split electrical box for modular buildings as described in claim 1, characterized in that: The upper surface of the box frame (1) is provided with an interface for connecting the inlet pipe, which is a flat oval opening (14) that can be connected to the pipe with a flat oval cross section.

8. A split electrical box for modular buildings as described in claim 1, characterized in that: A terminal block (5) is pre-installed on the top inner side of the box frame (1), and a grounding wire (6) is pre-installed on the inner side wall of both the box frame (1) and the box (2).

9. A split electrical box for modular buildings as described in any one of claims 1-8, characterized in that: The thickness of the box frame (1) is between 50mm and 60mm, and the thickness of the box (2) is selected between 10mm and 50mm. The overall thickness of the connected box frame (1) and box (2) is between 60mm and 100mm.

10. A split electrical box for modular buildings as described in any one of claims 1-8, characterized in that: The inner and outer surfaces of the box frame (1) and the box (2) are both coated with electrostatic powder coating.

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