An explosion-proof electrical cabinet

Abstract

The utility model provides a kind of explosion-proof electrical cabinet, belong to explosion-proof electrical cabinet installation technical field, including box body side plate, top plate and connecting structure, the upper end of box body side plate is provided with mounting portion, top plate is attached to the upper end of mounting portion;Connecting structure is used to connect top plate and box body side plate;Connecting structure includes multiple groups of floating connecting pieces and multiple groups of limiting connecting pieces, floating connecting piece and limiting connecting piece are alternately arranged, and limiting connecting piece penetrates top plate and is fixedly connected on mounting portion.The utility model provides a kind of explosion-proof electrical cabinet, through the combination of floating connecting piece and limiting connecting piece, form the double protection mechanism of dynamic buffering and rigid constraint;While the deformation adaptability of floating connecting piece under normal working condition is maintained, limiting connecting piece is increased, limiting connecting piece improves the load capacity of connecting structure to instantaneous impact load, solves the problem of insufficient impact resistance of the top cover mounting structure of existing explosion-proof electrical cabinet product.

Description

Technical Field

[0001] This utility model belongs to the field of explosion-proof electrical cabinet installation technology, and more specifically, it relates to an explosion-proof electrical cabinet. Background Technology

[0002] In existing explosion-proof electrical cabinet products, the top cover mounting structure commonly uses floating bolts and floating nuts for fixation. While this structure can adapt to minor deformations during equipment operation, it has significant shortcomings in dealing with sudden internal faults (such as short-circuit discharge, gas expansion, or mechanical impact). When ultra-high voltage or severe vibration occurs instantaneously inside the cabinet, the dynamic buffering characteristics of the floating nut make it unable to effectively restrain the instantaneous displacement of the top cover, causing the top cover to detach from the cabinet and be blown away. This not only damages surrounding equipment but may also pose a fatal threat to operators. Utility Model Content

[0003] The purpose of this utility model is to provide an explosion-proof electrical cabinet, which aims to solve the problem of insufficient impact resistance of the top cover mounting structure of existing explosion-proof electrical cabinet products.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide an explosion-proof electrical cabinet, comprising:

[0005] The box body side panel has a mounting part at its upper end;

[0006] Top plate, which fits against the upper end of the mounting part;

[0007] A connecting structure is provided for connecting the top plate and the mounting part; the connecting structure includes multiple sets of floating connecting structures and multiple sets of limiting connecting structures, the floating connecting structures and the limiting connecting structures are alternately arranged, and the limiting connecting structures pass through the top plate and are fixedly connected to the mounting part, for locking the top plate to the mounting part.

[0008] In another embodiment of this application, the limiting connector is symmetrically arranged along the centerline of the width direction of the top plate.

[0009] In another embodiment of this application, the top plate has a plurality of recessed grooves, the lower end of the recessed grooves is attached to the upper end surface of the box side plate, and the limiting connector and the floating connector both penetrate the bottom of the recessed grooves and are fixed to the box side plate at the lower end of the recessed grooves.

[0010] In another embodiment of this application, the mounting part is a folded edge structure, and the upper end surface of the folded edge structure forms a mounting surface; the lower end surface of the sink groove is attached to the mounting surface.

[0011] In another embodiment of this application, the lower end of the folded edge structure has a mounting groove, and the locking end of the limiting connector and the locking end of the floating connector are both located in the mounting groove.

[0012] In another embodiment of this application, the upper part of the side panel of the box has a fixing part and an extension part. The fixing part is horizontally arranged and extends toward the inside of the box. The extension part is connected to the free end of the fixing part and extends upward. The folded edge structure is connected to the upper end of the extension part. The folded edge structure, the extension part and the fixing part surround the mounting groove.

[0013] In another embodiment of this application, the connecting structure further includes a plurality of reinforcing plates, each of which corresponds to a limiting connector. The reinforcing plates are located in the mounting groove and are attached to the lower end face of the folded edge structure. The limiting connectors longitudinally penetrate the folded edge structure and the reinforcing plates in sequence.

[0014] In another embodiment of this application, the reinforcing plate includes a transverse support portion and a longitudinal support portion, the transverse support portion being attached to the lower end of the folded edge structure, and the longitudinal support portion being attached to the side wall of the mounting groove.

[0015] In another embodiment of this application, the transverse support portion is welded, riveted, or screwed to the folded edge structure.

[0016] The beneficial effects of the explosion-proof electrical cabinet provided by this utility model are as follows: Compared with the prior art, the explosion-proof electrical cabinet of this utility model forms a dual protection mechanism of dynamic buffering and rigid constraint through the combination of floating connectors and limiting connectors; while the floating connectors maintain the deformation adaptability under normal working conditions, the addition of limiting connectors improves the bearing capacity of the connection structure against instantaneous impact loads, solves the problem of insufficient impact resistance of the top cover installation structure of existing explosion-proof electrical cabinet products, and improves the safety performance of the explosion-proof electrical cabinet. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an explosion-proof electrical cabinet provided for an embodiment of this utility model;

[0019] Figure 2 A schematic diagram of the structure of an explosion-proof electrical cabinet when the top plate is missing, provided for an embodiment of this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 A side view of an explosion-proof electrical cabinet with the top plate missing, provided for an embodiment of this utility model;

[0022] Figure 5 for Figure 4 Enlarged view of point B in the image;

[0023] Figure 6 A schematic diagram of the connection between the box side plate and the limiting connector provided in an embodiment of this utility model;

[0024] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0025] Figure 8 A schematic diagram showing the connection between the side panel and the reinforcing plate of the box provided in an embodiment of this utility model;

[0026] Figure 9 for Figure 8 Enlarged view at point D;

[0027] Figure 10 A schematic diagram showing the connection between the reinforcing plate and the limiting connector provided in an embodiment of this utility model.

[0028] In the diagram: 1. Top plate; 2. Box side plate; 3. Folded edge structure; 4. Mounting groove; 5. Fixing bolt; 6. Floating bolt; 7. Floating nut; 8. Reinforcing plate; 9. Rivet; 10. Extension; 11. Fixing part; 12. Longitudinal support part; 13. Transverse support part. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] Please see Figures 1 to 10The present invention provides an explosion-proof electrical cabinet. The explosion-proof electrical cabinet includes a side panel 2, a top panel 1, and a connecting structure. The upper end of the side panel 2 is provided with a mounting portion, and the top panel 1 is attached to the upper end of the mounting portion. The connecting structure connects the top panel 1 and the mounting portion. The connecting structure includes multiple sets of floating connectors and multiple sets of limiting connectors, with the floating connectors and limiting connectors alternately arranged. The limiting connectors penetrate the top panel and are fixedly connected to the mounting portion, used to lock the top panel 1 to the upper end of the mounting portion, preventing the top panel 1 from detaching from the upper end of the side panel 2.

[0031] The side panel 2 and the top panel 1 of the enclosure are fixedly connected, currently using floating connectors such as floating nuts 7 for fixation. The top panel 1, relying solely on the floating connector as a single dynamic buffer structure, cannot simultaneously meet the requirements for deformation adaptation and rigid constraint under extreme working conditions. There is a risk of buffer failure in the mechanical response to instantaneous impact loads. For example, it cannot effectively constrain the instantaneous displacement of the top panel 1 during sudden high pressure or severe vibration, leading to the separation of the top panel 1 from the enclosure.

[0032] The upper surface of the mounting portion located at the upper end of the side panel 2 of the enclosure forms a mounting surface that surrounds the enclosure. A circular mounting track is formed on the top plate at the position corresponding to and connected to the mounting surface.

[0033] The annular mounting trajectory on the top plate 1 corresponds to the mounting section, and multiple connectors are evenly distributed along the annular mounting trajectory to connect the top plate 1 and the box side plate 2. To address the insufficient rigid constraint of the aforementioned single dynamic buffer structure, the connection structure between the top plate 1 and the box side plate 2 is divided into a portion of floating connectors and a portion of limiting connectors. The floating connectors can also utilize existing floating connectors such as floating nuts 7; the limiting connectors use a rigid connection method to connect the top plate 1 and the box side plate 2, such as the combination of fixing bolts 5 and fixing nuts. In the event of a mechanical response to an instantaneous impact load, the rigid connection method of the limiting connectors can improve the rigid constraint of the top plate 1 and the box side plate 2, preventing the top plate 1 from detaching from the upper end of the box side plate 2. Meanwhile, the retained portion of the floating connectors can still achieve their dynamic buffering function.

[0034] This utility model provides an explosion-proof electrical cabinet that, compared with the prior art, forms a dual protection mechanism of dynamic buffering and rigid constraint through the combination of floating connectors and limiting connectors. While the floating connectors maintain their deformation adaptability under normal working conditions, the addition of limiting connectors improves the load-bearing capacity of the connection structure against instantaneous impact loads, solves the problem of insufficient impact resistance of the top cover mounting structure of existing explosion-proof electrical cabinet products, and improves the safety performance of the explosion-proof electrical cabinet.

[0035] Optionally, each group of floating connectors includes multiple components, and the multiple floating connectors in the same group are arranged sequentially at intervals; the limiting connectors are located between two adjacent groups of floating connectors. Each group of limiting connectors includes one or more components.

[0036] The number of limiting connectors is less than the number of floating connectors. Under normal working conditions, the floating connectors still maintain their dynamic buffering effect, while under instantaneous loads, the limiting connectors play a load-bearing role.

[0037] The mounting section formed at the upper end of the side panel of the enclosure is a rectangular frame structure, thus the annular mounting trajectory is rectangular. Optionally, there are four sets of limiting connectors, located at the four corners of the mounting section and connected to the four corners of the top cover. The long and wide sides of the mounting section are connected to the top cover via floating connectors. When there is an instantaneous load inside, the floating connectors on the long and wide sides of the top cover can provide dynamic buffering, while the rigid connections at the corners prevent the top cover from instantly springing up.

[0038] Optionally, all the limiting connectors can be arranged on the long side of the mounting part, such as multiple sets of limiting connectors symmetrically arranged on the two long sides of the mounting part along the center line of the wide side of the mounting part. Furthermore, multiple sets of limiting connectors arranged on the same long side of the mounting part are symmetrical along the center line of the long side of the mounting part.

[0039] Taking the installation part with four sets of limiting connectors as an example, two of the four sets of limiting connectors are distributed on one long side of the installation part, and the other two sets are distributed on the other long side of the installation part.

[0040] Taking a mounting section with six sets of limiting connectors as an example, three sets of the six sets of limiting connectors are distributed on one long side of the mounting section, and the other three sets are distributed on the other long side of the mounting section. Among the three sets of limiting connectors located on the same long side, the spacing between adjacent sets of limiting connectors is the same.

[0041] Optionally, the limiting connectors can also be respectively arranged on the long side and the wide side of the mounting part, such as six sets of limiting connectors, with four sets distributed on the long side of the mounting part and the other two sets distributed on the wide side of the mounting part. The limiting connectors located on the wide side of the mounting part need to be symmetrical along the center line of the wide side of the mounting part.

[0042] When each side of the mounting section has a set of limiting connectors, the set of limiting connectors must be located at the midpoint of the side. If each set of limiting connectors has multiple limiting connectors, the multiple limiting connectors in the same set must be symmetrical along the centerline of the side of the mounting section.

[0043] In the following embodiments, there is only one limiting connector in each group.

[0044] In some possible embodiments, please refer to Figure 1 , Figure 2The limiting connectors are symmetrically arranged along the centerline of the width direction of the top plate 1.

[0045] To balance the uniform stress on the top plate 1 under extreme working conditions and avoid local connection failure, the limiting connectors must be installed in pairs and symmetrically arranged along the centerline of the wide side of the mounting part.

[0046] Optionally, multiple limiting connectors may be provided on the long side of the same side of the mounting part, and the multiple limiting connectors are symmetrically arranged along the center line of the long side of the mounting part; correspondingly, the multiple limiting connectors on the long side of the other side of the mounting part are completely symmetrical with the multiple limiting connectors on the long side of that side.

[0047] In some possible embodiments, please refer to Figure 1 The top plate 1 has several sinks, the lower end of which is attached to the upper end of the side plate 2 of the box. The limiting connector and the floating connector both penetrate the bottom of the sink and are fixed to the side plate 2 of the box at the lower end of the sink.

[0048] Multiple sinks are evenly distributed on the annular installation track of the top plate 1. Each sink has an installation hole at the bottom. During installation, the limiting connector and the floating connector pass through the installation hole and extend downward to connect to the side plate 2 of the box body.

[0049] When the limiting connector is a fixed bolt 5 structure and the floating connector is a floating bolt 6 structure, the fixed bolt 5 structure includes a fixed bolt 5 and a fixed nut, and the floating connector consists of a floating bolt 6 and a floating nut 7, wherein the fixed bolt 5 and the floating bolt 6 have the same structure. The floating nut 7 has a dynamic buffering function.

[0050] Both the fixed bolt 5 and the floating bolt 6 extend downwards through the mounting holes in the settling tank. A floating nut 7 and a fixed nut are fixed to the upper part of the side plate 2 of the tank body. The floating bolt 6 and the floating nut 7 are threaded together to form a floating connection, while the fixed bolt 5 and the fixed nut are threaded together to form a rigid connection. The nuts of the floating bolt 6 and the fixed bolt 5 are confined within the inner cavity of the settling tank to prevent the bolts from loosening or protruding due to external impacts or vibrations, thus reducing the risk of bolt damage from shear forces.

[0051] In addition, the depth of the groove can be greater than the height of the bolt head, and there is a gap between the two. During normal deformation, the bolt can float slightly. However, when the displacement of the top plate 1 exceeds the limit, the groove contacts the bolt head to form a rigid limit, triggering the mechanical stop function.

[0052] In some possible embodiments, please refer to Figures 2 to 9 The mounting part is a folded edge structure 3, and the upper end surface of the folded edge structure 3 forms a mounting surface; the lower end surface of the sink is attached to the mounting surface.

[0053] The upper end of the side panel 2 of the enclosure has a horizontally arranged folded edge structure 3, which is used to fit the top panel 1. During installation, the upper surface of the folded edge structure 3 forms a mounting surface, and the lower end of the recessed groove of the top panel 1 protrudes downward, with the lower end of the recessed groove fitting against the mounting surface. A longitudinal through hole is provided on the folded edge structure 3, and the longitudinal through hole corresponds to and communicates with the mounting holes on the top panel 1.

[0054] Fixed bolt 5 and floating bolt 6 pass through the mounting hole and longitudinal through hole in sequence. Fixed nut and floating nut 7 are both located at the lower end of the folded edge structure 3. Fixed bolt 5 is screwed to fixed nut, and floating bolt 6 is engaged with floating nut 7 to fix the folded edge structure 3 and top plate 1 together.

[0055] Specifically, the lower end of the folded structure 3 has a mounting groove 4, and the locking end of the limiting connector and the locking end of the floating connector are both located in the mounting groove 4.

[0056] The folded edge structure 3 is fixed to the body of the side panel 2 of the enclosure. The folded edge structure 3 extends laterally, forming a mounting groove 4 with the side panel 2. The mounting groove 4 accommodates a fixing nut and a floating nut 7. The mounting groove 4 is determined by the connection method between the upper structure of the side panel 2 and the folded edge structure 3. The opening of the mounting groove 4 can face outward or downward. When the folded edge structure 3 extends outward in the horizontal direction, the opening of the mounting groove 4 faces outward; if the free end of the folded edge structure 3 has a downward folded edge, then a downward-opening mounting groove 4 is formed between the folded edge structure 3 and the side panel 2.

[0057] In some possible embodiments, please refer to Figures 2 to 9 The upper part of the side panel 2 of the box has a fixing part 11 and an extension part 10. The fixing part 11 is horizontally arranged and extends toward the inside of the box. The extension part 10 is connected to the free end of the fixing part 11 and extends upward. The folded edge structure 3 is connected to the upper end of the extension part 10. The folded edge structure 3, the extension part 10 and the fixing part 11 form a mounting groove 4.

[0058] The upper part of the side panel 2 of the enclosure is bent inward to form a horizontally extending fixing part 11. The free end of the fixing part 11 is bent upward to form a longitudinally extending extension part 10. The free end of the extension part 10 is bent outward to form a horizontally extending folded edge structure 3. The three bends of the side panel 2 of the enclosure form the folded edge structure 3 and the mounting groove 4 located below the folded edge structure 3.

[0059] With the cooperation of the fixing part 11, the extension part 10, and the folded edge structure 3, the groove of the mounting groove 4 faces the outside of the housing. This facilitates the installation of the floating nut 7 and the fixing nut during installation.

[0060] In some possible embodiments, please refer to Figures 4 to 10The connecting structure also includes several reinforcing plates 8, which correspond one-to-one with the limiting connectors. The reinforcing plates 8 are located in the mounting groove 4 and are attached to the lower end face of the folded structure 3. The limiting connectors longitudinally penetrate the folded structure 3 and the reinforcing plates 8 in sequence.

[0061] A reinforcing plate 8 is also arranged inside the mounting groove 4, and the reinforcing plate 8 is connected to the limiting connector. The floating connector only needs to be connected to the folded edge structure 3.

[0062] The reinforcing plate 8 is fixed on the folded structure 3 to locally enhance the thickness and strength of the folded structure 3. The fixing bolt 5 of the limiting connector passes through the folded structure 3 and the reinforcing plate 8, and the fixing nut is attached to the lower end face of the reinforcing plate 8.

[0063] Specifically, the reinforcing plate 8 includes a transverse support portion 13 and a longitudinal support portion 12. The transverse support portion 13 is attached to the lower end of the folded edge structure 3, and the longitudinal support portion 12 is attached to the bottom of the mounting groove 4. The reinforcing plate 8 has an L-shaped plate structure. The transverse support portion 13 and the longitudinal support portion 12 of the reinforcing plate 8 are vertically connected. The transverse support portion 13 extends horizontally and is attached to the lower end face of the folded edge structure 3, while the longitudinal support portion 12 extends longitudinally and is attached to the bottom plate within the mounting groove 4. Since the mounting groove 4 is formed by connecting the folded edge structure 3 and the box side plate 2, the longitudinal support portion 12 is attached to the box side plate 2 near the folded edge structure 3 to enhance the connection strength of the folded edge structure 3, increase the stability of the reinforcing plate 8, and thus increase the connection strength of the fixing nut.

[0064] In addition to increasing local strength, the reinforcing plate 8 can also alter the force transmission. The L-shaped reinforcing plate 8 design allows the longitudinal force transmitted by the limiting connector to be directed to the box side plate 2 and the folded edge structure 3 respectively through the transverse support part 13 and the longitudinal support part 12. The longitudinal support part 12 fits snugly against the box side plate 2, allowing most of the longitudinal force to be directed into the box side plate 2. The remaining longitudinal force is transmitted to the folded edge structure 3 by the transverse support part 13, thereby reducing the stress load on the folded edge structure 3.

[0065] Optionally, inclined reinforcing ribs can be provided between the longitudinal support 12 and the transverse support 13, forming a triangular structure. When the folded structure 3 is subjected to asymmetrical loads, the local bending moment can be reduced and the load-bearing capacity of the folded structure 3 can be increased through the cooperation of the reinforcing plate 8 and the reinforcing ribs.

[0066] The transverse support 13 is welded, riveted or screwed to the folded edge structure 3.

[0067] During installation, the transverse support 13 can be fixed to the folded structure 3 by spot welding. The welded connection has high strength and is not easily damaged. However, during welding, the folded structure 3 and the transverse support 13 are prone to deformation, which affects the load-bearing effect.

[0068] Alternatively, it can be fixed by riveting. Rivet 9 passes through the folded edge structure 3 and the transverse support part 13 and fixes it, thus securing the transverse support part 13 to the folded edge structure 3. Similarly, rivet 9 can be replaced with a bolt and nut. A connecting groove is provided on the upper end face of the folded edge structure 3, and the nut of the rivet 9 or bolt is located in the connecting groove. Taking the connection with rivet 9 as an example, rivet 9 extends into the connecting groove, passing through the hole at the bottom of the connecting groove and the hole on the transverse support part 13, and the upper end face of rivet 9 is horizontal with the upper end face of the folded edge structure 3.

[0069] Specifically, the transverse support 13 has three through holes spaced apart along its length, including a first through hole for passing through the fixing bolt 5 and two second through holes for passing through the rivets 9. The two second through holes are located on both sides of the first through hole and are symmetrically arranged with respect to the axis of the first through hole.

[0070] During installation, firstly, the transverse support 13 is riveted to the lower end of the folded structure 3, and the fixing nut is welded to the lower end face of the transverse support 13. At the same time, the floating nut 7 is fixed to the lower end of the folded structure 3. Then, the top cover is placed, and the fixing bolt 5 and the floating bolt 6 are passed through the top cover and the folded structure 3. The fixing bolt 5 is connected to the fixing nut, and the floating bolt 6 is connected to the floating nut 7.

[0071] 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 and improvements 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. An explosion-proof electrical cabinet, characterized in that, include: Box side panel (2), the upper end of which is provided with a mounting part; Top plate (1) is attached to the upper end of the mounting part; A connecting structure is used to connect the top plate (1) and the mounting part; the connecting structure includes multiple sets of floating connectors and multiple sets of limiting connectors, the floating connectors and the limiting connectors are alternately arranged, and the limiting connectors pass through the top plate (1) and are fixedly connected to the mounting part, for locking the top plate (1) at the upper end of the mounting part.

2. An explosion-proof electrical cabinet as claimed in claim 1, characterized in that The limiting connector is symmetrically arranged along the center line of the wide side of the top plate (1).

3. An explosion-proof electrical cabinet as claimed in claim 1, characterized in that The top plate (1) has several sinks, the lower end of which is attached to the upper surface of the side plate (2) of the box body. The limiting connector and the floating connector both penetrate the bottom of the sink and are fixed to the side plate (2) of the box body at the lower end of the sink.

4. An explosion-proof electrical cabinet as claimed in claim 3, characterised in that The mounting part is a folded edge structure (3), and the upper end surface of the folded edge structure (3) forms a mounting surface; the lower end surface of the sink groove is attached to the mounting surface.

5. An explosion-proof electrical cabinet as claimed in claim 4, characterised in that The lower end of the folded structure (3) has a mounting groove (4), and the locking end of the limiting connector and the locking end of the floating connector are both located in the mounting groove (4).

6. An explosion-proof electrical cabinet as claimed in claim 5, characterised in that The upper part of the side panel (2) of the box has a fixing part (11) and an extension part (10). The fixing part (11) is horizontally arranged and extends toward the inside of the box. The extension part (10) is connected to the free end of the fixing part (11) and extends upward. The folded edge structure (3) is connected to the upper end of the extension part (10). The folded edge structure (3), the extension part (10) and the fixing part (11) surround the mounting groove (4).

7. An explosion-proof electrical cabinet as claimed in claim 5, characterised in that The connecting structure also includes several reinforcing plates (8), each of which corresponds to a limiting connector. The reinforcing plate (8) is located in the mounting groove (4) and is attached to the lower end face of the folded edge structure (3). The limiting connector extends longitudinally through the folded edge structure (3) and the reinforcing plate (8).

8. An explosion-proof electrical cabinet as claimed in claim 7, characterised in that The reinforcing plate (8) includes a transverse support (13) and a longitudinal support (12). The transverse support (13) is attached to the lower end of the folded structure (3), and the longitudinal support (12) is attached to the side wall of the mounting groove (4).

9. An explosion-proof electrical cabinet as claimed in claim 8, characterised in that The transverse support (13) is welded, riveted or screwed to the folded edge structure (3).

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