Novel ventilation door plate structure and low-voltage switch cabinet

Abstract

The utility model relates to a novel ventilation door plate structure and a low-voltage switch cabinet, the novel ventilation door plate structure comprises a door plate, a ventilation net, a net pressing plate and a fastening bolt, the door plate comprises a ventilation part, the side edge of the ventilation part is provided with the ventilation net and the net pressing plate, the ventilation net is arranged between the ventilation part and the net pressing plate, and the net pressing plate is in fastening connection with the door plate through the fastening bolt. The ventilation net is tightly pressed on the ventilation part of the door plate through the net pressing plate, the ventilation net and the door plate are tightly attached through the fastening bolts, the net pressing plate is tightly attached to the surface of the edge of the ventilation net, and free deformation of the ventilation net in the thickness direction is limited; and dust entering caused by a gap between the ventilation net and the door plate due to wrinkling of the ventilation net is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of power supply equipment, in particular to a novel ventilation door panel structure and a low-voltage switch cabinet. Background Art

[0002] Low-voltage switchgear is suitable for all power generation, distribution and power usage occasions. After a period of normal operation, the primary and secondary components, copper busbars, cables and other components inside the switchgear may heat up, causing the temperature inside the switchgear to rise. If the heat inside the switchgear cannot be dissipated in time, the temperature inside the switchgear will be too high and cause the switchgear to burn out.

[0003] At present, in order to improve the ventilation and heat dissipation performance of low-voltage switchgear, square holes can be drilled on the door panels for heat dissipation. However, after drilling, the protection level IP3X and above required by the switchgear cannot be achieved. Then, the front lower door ventilation mesh with a mesh specification of 1×2 mm is welded to the door panel by spot welding; in order to protect the metal material of the cabinet from oxidation, corrosion and damage, the switchgear door panel also needs to be sprayed with plastic.

[0004] The front lower door ventilation net adopts a galvanized mesh plate structure. There are precision errors and welding slag generated during the spot welding process, which causes the mesh plate to bend between adjacent welding points of the front lower door ventilation net, resulting in a gap between the mesh plate and the door panel, and dust will enter during use. Utility Model Content

[0005] The first aspect of the utility model aims to solve the technical problem that improper operation of the existing ventilation mesh during spot welding causes the mesh to bend and form gaps, allowing dust to enter the interior of the cabinet through the gaps. A new ventilation door panel structure is provided, which can press the ventilation mesh tightly against the door panel through a mesh pressure plate and then fix it in place by fastening bolts to prevent the ventilation mesh from wrinkling and causing dust to enter. The main concept is:

[0006] A novel ventilation door panel structure includes a door panel, a ventilation mesh, a mesh pressure plate, and fastening bolts. The door panel includes a ventilation portion, on which the ventilation mesh and mesh pressure plate are mounted. The ventilation mesh is positioned between the ventilation portion and the mesh pressure plate, and the mesh pressure plate is fastened to the door panel via fastening bolts. In this solution, the mesh pressure plate presses the ventilation mesh against the ventilation portion of the door panel, and the fastening bolts ensure a tight fit between the ventilation mesh and the door panel. The mesh pressure plate, by closely fitting the edge of the ventilation mesh, limits the free deformation of the ventilation mesh in the thickness direction, preventing wrinkling of the ventilation mesh, which could create a gap between the ventilation mesh and the door panel and allow dust to enter.

[0007] Preferably, the ventilation part includes a plurality of ventilation holes for heat dissipation of the switch cabinet, and the ventilation holes are strip-shaped holes. The ventilation part is centrally provided with a plurality of ventilation holes for heat dissipation.

[0008] Preferably, the door panel further includes positioning square holes, which are evenly arranged on the sides of the positioning portion. The positioning holes are evenly arranged on the four sides of the positioning portion. On the one hand, the fastening bolts can be inserted into the positioning square holes for positioning and installation. On the other hand, the positioning square holes place the fastening bolts outside the vents, which does not affect the normal ventilation of the door panel.

[0009] Preferably, the mesh pressure plate is a rectangular frame, with first mounting holes evenly distributed around the mesh pressure plate. The spacing between adjacent first mounting holes is equal to the spacing between adjacent positioning square holes on the door panel, and the first mounting holes and the positioning square holes cooperate with each other. The first mounting holes and the positioning square holes are aligned with each other so that all the first mounting holes on the mesh pressure plate can cooperate with the fastening bolts inserted into the door panel.

[0010] Preferably, a second mounting hole is provided on the ventilation net, and the second mounting hole cooperates with the positioning square hole.

[0011] The second aspect of the present invention aims to solve the technical problem that during the spraying process of the ventilated door panel structure, the powder of the sprayed plastic will block the mesh holes after hot melting, affecting the ventilation and heat dissipation effect of the cabinet door. Furthermore, the ventilation net is a stainless steel net. The ventilation net made of stainless steel material used in this solution is not easily oxidized, corroded and damaged during use, so the ventilation net does not need to be sprayed with plastic, which avoids the powder in the spraying process blocking the mesh holes and affecting the heat dissipation effect. In addition, this solution connects the door panel and the ventilation net by mechanical connection, so that the door panel can be sprayed with plastic alone without affecting the installation of the ventilation net and the mesh pressure plate.

[0012] A third aspect of the present invention aims to solve the technical problem of cumbersome steps when positioning multiple positioning holes. Furthermore, the fastening bolt includes a positioning portion and a threaded connection portion, the positioning portion being disposed on a side adjacent to the nut and connected to the positioning square hole by an interference fit. This solution effectively limits the rotational freedom of the fastening bolt on the positioning portion by stably positioning the fastening bolt in the positioning square hole. The positioning portion is inserted into the positioning square hole and connected by an interference fit, ensuring stable installation of the fastening bolt's screw on the door panel. This prevents the ventilation net and the net pressure plate from rotating during installation and tightening by rotating the nut, leading to loosening or failure of the bolt. Furthermore, the square positioning square hole allows the positioning portion of the fastening bolt to automatically center and maintain its correct position after insertion. During installation, the fastening bolt only needs to be stably mounted on the door panel via the positioning portion. The fastening bolt can then be directly positioned and installed via the second mounting hole provided in the ventilation net and the net pressure plate. Tightening the nut of the fastening bolt secures the ventilation net to the door panel, improving installation efficiency.

[0013] A low-voltage switch cabinet includes a ventilation door panel structure and a cabinet body, wherein the cabinet body is movably connected to the door panel, and a cable support beam for cable wiring, an N row for neutral cable connection, and a main circuit static plug-in for user cable connection are provided in the cabinet body. The cable support beam is horizontally and tiltedly installed at a position between the N row and the main circuit static plug-in, and a mounting plate provided with a zero-sequence mutual inductor is installed on the cable support beam. In this solution, the cable support beam is horizontally and tiltedly installed in the cabinet body, so that the mounting plate provided with the zero-sequence mutual inductor installed on the cable support beam is also tiltedly installed in the middle part of the cabinet body, which not only increases the bending arc space between the zero-sequence mutual inductor and the cable, but also shortens the path between the cable and the N row and the main circuit static plug-in. Therefore, when the user runs a thicker cable, it is convenient to bend through the mutual inductor to reach the N row and the main circuit static plug-in for incoming connection, and the cable routing layout is also more beautiful.

[0014] The beneficial effects of the present invention are:

[0015] The mesh pressure plate presses the ventilation mesh tightly against the ventilation part of the door panel, and makes the ventilation mesh and the door panel fit tightly together by tightening the bolts. The mesh pressure plate fits tightly against the surface of the edge of the ventilation mesh, limiting the free deformation of the ventilation mesh in the thickness direction, thus avoiding wrinkling of the ventilation mesh and causing gaps between the ventilation mesh and the door panel, which in turn allows dust to enter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 .

[0017] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 .

[0018] Figure 3 This is a schematic structural diagram of the ventilation part of the present utility model.

[0019] Figure 4 This is a schematic structural diagram of the mesh pressure plate of the present utility model.

[0020] Figure 5 This is a schematic diagram of the ventilation network structure of the present utility model.

[0021] Figure 6 This is a schematic diagram of the fastening bolt of the present invention.

[0022] Figure 7 This is a schematic diagram of the fastening bolt of the present invention.

[0023] Figure 8 It is a structural diagram of the cabinet of the present utility model.

[0024] The reference numerals include: 1. door panel; 11. ventilation part; 12. positioning square hole; 13. vent; 2. ventilation net; 21. second mounting hole; 3. net pressure plate; 31. first mounting hole; 4. fastening bolt; 41. positioning part; 42. threaded connection part; 5. cabinet; 51. cable installation beam; 52. N row; 53. main circuit static plug-in; 54. mounting plate. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. When the following description refers to the drawings, unless otherwise indicated, identical numbers in different drawings represent identical or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0026] In this disclosure, unless otherwise specified, directional terms such as "inner" and "outer" are defined based on the contours of the corresponding components. Terms such as "first" and "second" are used in this disclosure to distinguish one element from another and do not convey order or importance.

[0027] Example 1:

[0028] like Figures 1 to 2 As shown, this embodiment is a new type of ventilation door panel structure, including a door panel 1, a ventilation net 2, a net pressure plate 3 and a fastening bolt 4. The door panel 1 includes a ventilation part 11, and the ventilation net 2 and the net pressure plate 3 are installed on the side of the ventilation part 11. The ventilation net 2 is arranged between the ventilation part 11 and the net pressure plate 3, and the net pressure plate 3 is fastened to the door panel 1 by fastening bolts.

[0029] The ventilation net 2 of this embodiment is kept in a tensioned state, and a net pressing plate 3 is set to press the ventilation net 2 against the ventilation portion 11 of the door panel 1, and the ventilation net 2 and the door panel 1 are tightly fitted by tightening bolts 4. The net pressing plate 3 closely fits the surface of the edge of the ventilation net 2, limiting the free deformation of the ventilation net 2 in the thickness direction, and preventing the ventilation net 2 from wrinkling and causing a gap between the ventilation net and the door panel 1, which can cause dust to enter. Figure 1-Figure 3 As shown, the ventilation part 11 of this embodiment includes a plurality of ventilation holes 13 for heat dissipation of the switch cabinet. The ventilation holes 13 are strip-shaped holes. The ventilation part 11 is centrally provided with a plurality of strip-shaped holes for heat dissipation.

[0030] In one embodiment, the vent 13 is a strip-shaped louver opening downward. Setting the vent 13 as a louver opening downward can prevent dust from easily entering the interior of the switch cabinet through the ventilation part 11, and setting the opening of the vent downward can also improve the overall light-shielding performance of the switch cabinet.

[0031] like Figure 3 As shown, the door panel 1 further includes positioning square holes 12, which are evenly arranged on the sides of the positioning portion 11. The positioning square holes 12 are evenly arranged on the four sides of the positioning portion 11. On the one hand, the fastening bolts 4 can be inserted into the positioning square holes 12 for positioning and installation. On the other hand, the positioning square holes 12 place the fastening bolts 4 outside the vents, which does not affect the normal ventilation of the door panel.

[0032] like Figure 2-Figure 4 As shown, the mesh pressure plate 3 of this embodiment is a rectangular frame, with first mounting holes 31 evenly distributed around the mesh pressure plate 3. The spacing between adjacent first mounting holes 31 is equal to the spacing between adjacent positioning square holes 12 on the door panel 1. The first mounting holes 21 and the positioning square holes 12 cooperate with each other. The first mounting holes 31 are aligned with the positioning square holes 12 so that all the first mounting holes on the mesh pressure plate 3 can cooperate with the fastening bolts 4 inserted in the door panel 1.

[0033] like Figure 5 As shown, a second mounting hole 21 is provided on the ventilation net 2 , and the second mounting hole 21 cooperates with the positioning square hole 12 .

[0034] Example 2:

[0035] The ventilation mesh 2 of this embodiment is a stainless steel mesh. The stainless steel ventilation mesh 2 is not susceptible to oxidation, corrosion, or damage during use, so it does not require plastic spraying. This prevents powder from clogging the mesh holes during the plastic spraying process and affecting the heat dissipation effect. Furthermore, the door panel 1 and ventilation mesh 2 are connected by mechanical connection, allowing the door panel 1 to be plastic sprayed independently without affecting the installation of the ventilation mesh 2 and the mesh pressure plate 3.

[0036] Example 3:

[0037] Such as 6- Figure 7 As shown, the fastening bolt 4 of this embodiment includes a positioning portion 41 and a threaded connection portion 42. The screw positioning portion 41 is provided on a side close to the nut, and the positioning portion 41 is connected to the positioning square hole 12 by interference fit.

[0038] The positioning portion 41 of this embodiment adopts a square structure, so that the positioning portion 41 can cooperate with the positioning square hole 12 .

[0039] This embodiment can effectively limit the rotational freedom of the fastening bolt 4 on the positioning portion 41 by stably positioning the positioning portion 41 of the fastening bolt 4 in the positioning square hole 12. The positioning portion 41 is inserted into the positioning square hole 12 and connected through interference fit to ensure the stable installation of the screw rod of the fastening bolt 4 on the door panel 1, avoiding the problem of loosening or failure caused by the rotation of the bolt during the installation of the ventilation net 2 and the net pressure plate 3 and the process of fastening by rotating the nut.

[0040] The square positioning hole 12 of the square structure enables the positioning portion 41 of the fastening bolt 4 to be automatically centered and maintained in the correct position after being inserted into the hole. During the installation process, it is only necessary to first stably install the fastening bolt 4 on the door panel 1 through the positioning portion 41, and then it can be directly positioned and installed with the fastening bolt 4 through the mounting hole set in the ventilation net 2 and the second mounting hole of the net pressure plate 3. By tightening the nut of the fastening bolt, the net pressure plate 3 can press the ventilation net 2 on the door panel 1, thereby improving the installation efficiency.

[0041] The height of the positioning portion is no greater than the overall thickness formed between the door panel and the outermost mesh pressure plate, so that the positioning portion of the fastening bolt does not interfere with the nut after being inserted into the positioning square hole.

[0042] Example 5:

[0043] like Figure 8 As shown, this embodiment provides a low-voltage switch cabinet, including a ventilation door panel structure, and also includes a cabinet body 5, which is movably connected to the door panel 1. The cabinet body 5 is provided with a cable support beam 51 for cable wiring, an N row 52 for connecting the neutral cable, and a main circuit static plug-in 53 for connecting the user cable. The cable support beam 51 is horizontally and tiltedly installed at a position between the N row 52 and the main circuit static plug-in 53. A mounting plate 54 with a zero-sequence transformer is installed on the cable support beam 51. In this solution, the cable support beam is horizontally and tiltedly installed in the cabinet, so that the mounting plate 51 with the zero-sequence transformer installed on the cable support beam 51 is also tilted in the middle part of the cabinet body 5. This not only increases the bending arc space between the zero-sequence transformer and the cable, but also shortens the path between the cable and the N row 52 and the main circuit static plug-in 53. Therefore, when the user runs a thicker cable, it is convenient to bend through the transformer to reach the N row 52 and the main circuit static plug-in 53 for incoming connection, and the cable routing layout is also more beautiful.

[0044] The above is only an embodiment of the present invention, and the commonly known specific structures and characteristics of the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, and these should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A new ventilation door panel structure, characterized by: The invention comprises a door panel (1), a ventilation net (2), a net pressure plate (3) and fastening bolts (4); the door panel (1) comprises a ventilation portion (11); the ventilation net (2) and the net pressure plate (3) are installed in the ventilation portion (11); the ventilation net (2) is arranged between the ventilation portion (11) and the net pressure plate (3); and the net pressure plate (3) is fastened to the door panel (1) by fastening bolts; The door panel (1) further comprises positioning square holes (12), which are evenly arranged at the side positions of the ventilation portion (11); the mesh pressure plate (3) is a rectangular frame, and first mounting holes (31) are evenly distributed around the mesh pressure plate (3), and the spacing between adjacent first mounting holes (31) is equal to the spacing between adjacent positioning square holes (12) on the door panel (1), and the first mounting holes (31) and the positioning square holes (12) cooperate with each other; second mounting holes (21) are provided on the ventilation net (2), and the second mounting holes (21) cooperate with the positioning square holes (12).

2. A novel ventilation door panel structure according to claim 1, characterized in that: The ventilation portion (11) comprises a plurality of ventilation openings (13) for heat dissipation of the switch cabinet, and the ventilation openings (13) are strip-shaped holes.

3. The novel ventilation door panel structure according to claim 1, characterized in that: The ventilation net (2) is a stainless steel net.

4. The novel ventilation door panel structure according to claim 1, characterized in that: The fastening bolt (4) comprises a positioning portion (41) and a threaded connection portion (42); the positioning portion (41) is arranged on a side close to the nut, and the positioning portion (41) is connected to the positioning square hole (12) through interference fit.

5. A low-voltage switchgear, characterized in that: The invention comprises the ventilation door panel structure according to any one of claims 1 to 4.

6. The low-voltage switchgear according to claim 5, characterized in that: The cabinet (5) further comprises a cabinet body (5) which is movably connected to the door panel (1). A cable support beam (51) for cable wiring, an N row (52) for connecting a neutral cable, and a main circuit static plug-in (53) for connecting a user cable are provided in the cabinet body (5). The cable support beam (51) is horizontally and tiltedly installed at a position between the N row (52) and the main circuit static plug-in (53). A mounting plate (54) provided with a zero-sequence mutual inductor is installed on the cable support beam (51).

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