Low-voltage cabinet and bus cover thereof

Abstract

The utility model discloses a low-voltage cabinet and a bus cover thereof, and the bus cover comprises a mesh plate which is provided with a plurality of ventilation holes; the inner sliding plate is provided with a plurality of inner plate holes; the cushion block is at least made of a silica gel material; the two side plates are respectively fixed on two sides of the mesh plate; wherein the mesh plate and the two side plates define a space for accommodating a bus; the inner sliding plate is in sliding connection with the mesh plate; a placing groove is formed or connected to the inner side of the mesh plate; the cushion block is arranged in the placing groove; the bottom of the inner sliding plate makes contact with the top of the cushion block so that the cushion block can change the relative position between the inner plate hole and the ventilation hole during thermal expansion and cold contraction. The low-voltage cabinet and the bus cover thereof provided by the utility model have the beneficial effects that the total ventilation area of the bus cover can be adjusted according to the temperature change.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage power transformation, in particular to a low-voltage cabinet and a busbar cover thereof. Background Art

[0002] The busbar in the low-voltage cabinet is used to distribute current to each drawer circuit. The busbar is always energized and the current is large. For safety reasons, the busbar needs to be covered in accordance with relevant standards. We call the covering a busbar cover.

[0003] In order to achieve heat dissipation of the busbar, ventilation holes are often opened on the busbar cover. If the total area of ​​the ventilation holes is large, the strength of the busbar cover will be weakened and dust will easily enter the space where the busbar is located; if the total area of ​​the ventilation holes is small, heat dissipation cannot be effectively performed.

[0004] The existing technology cannot effectively solve the problem of the ventilation holes being too large or too small. Utility Model Content

[0005] The content of this utility model is used to introduce the concepts in a brief form, which will be described in detail in the following specific implementation. The content of this utility model is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0006] Some embodiments of the present utility model provide a low-voltage cabinet and a busbar cover thereof to solve the technical problems mentioned in the above background technology part.

[0007] As a first aspect of the present utility model, some embodiments of the present utility model provide a busbar cover, comprising:

[0008] A mesh plate provided with a plurality of ventilation holes;

[0009] An inner slide plate is provided with a plurality of inner plate holes;

[0010] A spacer, made of at least a silicone material;

[0011] Two side panels are respectively fixed on two sides of the mesh plate;

[0012] Among them, the mesh plate and two side plates enclose a space for accommodating the busbar; the inner slide plate is slidably connected to the mesh plate; a placement groove is formed or connected to the inner side of the mesh plate; a pad is arranged in the placement groove; the bottom of the inner slide plate contacts the top of the pad so that the pad changes the relative position between the inner plate hole and the ventilation hole when the pad expands and contracts due to heat.

[0013] Furthermore, the inner slide plate and the mesh plate form a sliding connection in a vertical direction.

[0014] Furthermore, the busbar cover also includes: an inner plate slide rail fixedly arranged on the inner side of the mesh plate; an inner slide plate arranged between the two inner plate slide rails and at least partially embedded in the two inner plate slide rails.

[0015] Furthermore, the busbar cover also includes: a slot block, which is formed with the placement slot; wherein the slot block is fixedly connected to the inner side of the inner slide plate.

[0016] Furthermore, a notch for placing the slot is provided on the top of the slot body.

[0017] Furthermore, the busbar cover includes a plurality of pads, and the plurality of pads are arranged at intervals.

[0018] Further, the ventilation hole is constructed to have an arc-shaped contour; and the inner plate hole is constructed to have an arc-shaped contour with a curvature direction opposite to that of the arc-shaped contour of the ventilation hole.

[0019] Furthermore, the ventilation holes are aligned with the inner plate holes in the horizontal direction.

[0020] As a second aspect of the utility model, some embodiments of the utility model provide a medium-low voltage cabinet, including: a cabinet body and a plurality of busbars arranged therein; the low voltage cabinet also includes: a busbar cover as mentioned above, in which the busbars are accommodated.

[0021] Furthermore, the low-voltage cabinet also includes: phase change material; a packaging box, forming a space for accommodating the phase change material; a heat conductive sheet, at least partially embedded in the phase change material; a partition, fixedly arranged inside the cabinet; wherein the packaging box is fixed to the upper surface of the partition; the heat conductive sheet contacts the busbar cover after passing through the partition; and the busbar cover and the partition are fixedly connected.

[0022] The beneficial effect of the utility model is that it provides a low-voltage cabinet and a busbar cover thereof which can adjust the total ventilation area of ​​the busbar cover according to temperature changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and advantages of the present invention become more obvious. The drawings and descriptions of the exemplary embodiments of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0024] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0025] In the attached picture:

[0026] Figure 1 This is a structural schematic diagram of a low-voltage cabinet according to an embodiment of the utility model after the side cover is removed;

[0027] Figure 2 yes Figure 1 The schematic diagram of the structure inside the low voltage cabinet shown;

[0028] Figure 3 yes Figure 1 The schematic structural diagram of the busbar cover of the low-voltage cabinet shown is observed from a first viewing angle;

[0029] Figure 4 yes Figure 1 A schematic structural diagram of a busbar cover of a low-voltage cabinet shown in FIG. 1 , observed from a second viewing angle;

[0030] Figure 5 yes Figure 1 The schematic diagram of the structure of the busbar cover of the low-voltage cabinet shown in FIG.

[0031] Figure 6 yes Figure 5 A partially enlarged structural schematic diagram;

[0032] Figure 7 yes Figure 1 The exploded structural diagram of the busbar cover of the low-voltage cabinet shown;

[0033] Figure 8 yes Figure 1 The schematic cross-sectional structure diagram of the junction of the partition, packaging box and busbar cover of the low-voltage cabinet shown;

[0034] Fig. 9 yes Figure 1 A plan view of a mesh plate of a low voltage cabinet is shown;

[0035] Fig.10 yes Figure 1 A plan view of the inner slide plate of the low voltage cabinet shown;

[0036] Fig.11 yes Figure 1 The structural schematic diagram of the ventilation hole and the inner plate hole of the low-voltage cabinet shown is in a first relative state;

[0037] Fig.12 yes Figure 1 The structure diagram shown is when the ventilation holes and inner plate holes of the low-voltage cabinet are in a second relative state.

[0038] The meanings of the reference numerals are as follows:

[0039] 100, low voltage cabinet; 101, cabinet body; 1011, cabinet door; 1012, frame; 1013, partition; 102, busbar; 103, packaging box; 104, phase change material; 105, heat conductive sheet; 200, busbar cover; 201, mesh plate; 2011, ventilation hole; 206, side panel; 202, inner slide plate; 2021, inner plate hole; 203, cushion block; 204, slot block; 2041, placement slot; 205, inner plate slide rail. DETAILED DESCRIPTION

[0040] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0041] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0042] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0043] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0044] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0045] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0046] Reference Figure 1 to Figure 2 As shown, the low voltage cabinet 100 of the present invention comprises: a cabinet body 101 and a plurality of busbars 102 arranged therein.

[0047] The low voltage cabinet 100 also includes other power transformation equipment, which are not the focus of improvement in the present invention and are therefore not described in detail.

[0048] As an optional solution, the cabinet body 101 includes: a cabinet door 1011 and cover plates fixed on both sides thereof (not shown in the figure). The cabinet door 1011 is for the convenience of users to open the low-voltage cabinet 100 for maintenance and other work.

[0049] The low voltage cabinet 100 further comprises a frame 1012 and a partition 1013 arranged inside the cabinet body 101. For stable support, the frame 1012 and the partition 1013 are both fixed inside the solid body.

[0050] Reference Figures 3 to 12 As shown, the busbar cover 200 of the present invention includes: a mesh plate 201 , two side plates 206 , an inner slide plate 202 , and a cushion block 203 .

[0051] Specifically, the mesh plate 201 is provided with a plurality of ventilation holes 2011; the two side plates 206 are respectively fixed on both sides of the mesh plate 201; wherein the mesh plate 201 and the two side plates 206 enclose a space for accommodating the busbar 102. For example, the mesh plate 201 is arranged in front of the busbar 102, and the side plates 206 are arranged on the left and right sides of the busbar 102.

[0052] In order to facilitate processing while taking into account structural strength, as a preferred solution, the mesh plate 201 and the side plate 206 can be made of punched metal plates.

[0053] In order to be able to adjust the total opening area of ​​the busbar cover 200, the inner slide plate 202 of the busbar cover 200 of the utility model is provided with a plurality of inner plate holes 2021; the pad 203 is made of at least silicone material; wherein the inner slide plate 202 and the mesh plate 201 form a sliding connection; a placement groove 2041 is formed or connected to the inner side of the mesh plate 201; the pad 203 is arranged in the placement groove 2041; the bottom of the inner slide plate 202 contacts the top of the pad 203 so that the pad 203 changes the relative position between the inner plate hole 2021 and the ventilation hole 2011 when the heat expands and contracts.

[0054] In this way, when the temperature rises, the pad 203 will increase the height of the inner slide plate 202 due to thermal expansion and contraction, thereby increasing the portion of the ventilation hole 2011 aligned with the inner plate hole 2021, thereby increasing the actual ventilation area; when the temperature drops, the pad 203 will lower the height of the inner slide plate 202 due to thermal expansion and contraction, thereby reducing the portion of the ventilation hole 2011 aligned with the inner plate hole 2021, thereby reducing the actual ventilation area; that is, the ventilation area that the busbar cover 200 can actually provide is adaptively adjusted through the thermal expansion and contraction of the pad 203.

[0055] It should be noted that since the pad 203 is made of silicone material, it has a good thermal expansion and contraction effect. In order to achieve a better adjustment effect, that is, to provide sufficient longitudinal size changes when the pad 203 expands and contracts, the pad 203 itself needs sufficient longitudinal size and thickness (size in the front-to-back direction). However, if a whole pad 203 is placed in the placement groove 2041, the deformation occurs in all directions due to thermal expansion and contraction. Therefore, it is easy to cause the left-right deformation of the pad 203 to exceed the length of the placement groove 2041, resulting in deformation of the pad 203. Therefore, as a preferred solution, the busbar cover 200 can be expanded with multiple pads 203, and multiple pads 203 are arranged at intervals in the left-to-right direction. Since the size of the pad 203 in the front-to-back direction is limited, it is only necessary to make the placement groove 2041 slightly larger than the thickness of the pad 203 in the front-to-back direction.

[0056] In addition, as a preferred solution, the inner slide plate 202 and the mesh plate 201 form a sliding connection in the vertical direction. Of course, a sliding connection in the left-right direction can also be used. Although the sliding connection in the left-right direction can make the thermal expansion and contraction of the cushion block 203 not need to overcome the gravity of the inner slide plate 202. However, this requires the installation of an additional reset device such as a spring, so the cushion block 203 still needs to overcome the force required for this part of the recovery. Therefore, as a preferred solution, choosing gravity as the restoring force can simplify the structure of the busbar cover 200.

[0057] In order to minimize the influence of gravity, the inner slide plate 202 is made as thin as possible; and a combination of multiple groups of inner slide plates 202 and cushions can be set in the vertical direction (up and down direction) to reduce the size of the inner slide plate 202. A more preferred solution may be that the inner slide plate 202 is only provided with one row of inner plate holes 2021 to minimize the height of the inner slide plate.

[0058] As a specific solution, the ventilation hole 2011 and the inner plate hole 2021 are aligned in the horizontal direction (ie, the left-right direction).

[0059] As a specific solution, the busbar cover 200 further includes: an inner plate slide rail 205 .

[0060] The two inner plate rails 205 are fixedly arranged on the inner side of the mesh plate 201; and the inner slide plate 202 is arranged between the two inner plate rails 205 and at least partially embedded in the two inner plate rails 205. In this way, the inner slide rails not only limit the position of the inner slide plate 202 in the left and right direction, but also cooperate with the mesh plate 201 to limit the position of the inner slide plate 202 in the front and rear direction.

[0061] As a preferred solution, the inner slide rail can also be made of metal material, which can achieve a better heat transfer effect and allow the cushion block 203 to produce sufficient deformation.

[0062] As a preferred solution, the busbar cover 200 further includes a slot block 204. The slot block 204 is formed with the aforementioned placement slot 2041.

[0063] The slot block 204 is fixedly connected to the inner side of the inner slide plate 202. Although the mesh plate 201 can be used to directly form the aforementioned placement slot 2041, considering the sheet metal process, the mesh plate 201 needs to be bent at different positions, which will undoubtedly increase the processing difficulty and reduce the strength of the mesh plate 201.

[0064] Therefore, a better implementation method is to use an additional slot block 204 to form the aforementioned placement slot 2041 and weld it to the inner side of the mesh plate 201.

[0065] As an alternative, the ventilation holes 2011 and the ventilation holes 2011 can both be round holes or circular holes. However, such relatively uniform and regular shapes cannot effectively adjust the ventilation area when the inner slide plate 202 slides a small distance.

[0066] Reference Fig. 9 and Fig.12 As shown, as a preferred embodiment, the ventilation hole 2011 is constructed to have an arc-shaped profile; the inner plate hole 2021 is constructed to have an arc-shaped profile with a bending direction opposite to that of the arc-shaped profile of the ventilation hole 2011.

[0067] More specifically, the vents 2011 Figures 9 to 12 The projection profile in the drawing shown includes two semicircular arcs that are arranged opposite to each other and have different radii. The circles of the two semicircular arcs are aligned in the left-right direction. The projection profile also includes two straight edges that respectively connect the endpoints of the two semicircular arcs.

[0068] Similarly, the inner plate hole 2021 is also Figures 9 to 12 The projection profile in the drawing shown includes two semicircular arcs that are arranged opposite to each other and have different radii. The circles of the two semicircular arcs are aligned in the left-right direction. The projection profile also includes two straight edges that respectively connect the endpoints of the two semicircular arcs.

[0069] The difference between the ventilation hole 2011 and the inner plate hole 2021 is that the larger semicircle arc of the ventilation hole 2011 is located at the top, while the larger semicircle beard of the inner plate hole 2021 is located at the bottom.

[0070] In this way, if Fig.11 and Fig.12 As shown, when the inner hole plate slides relative to the ventilation hole 2011, the area of ​​the composite hole formed by them changes greatly.

[0071] As a preferred solution, in order to make the deformation of the cushion block 203 controllable, the inner hole plate should not slide excessively relative to the ventilation hole 2011 so as to completely close the ventilation hole 2011.

[0072] A packaging box 103 is fixed above the partition 1013, that is, the packaging box 103 is fixed on the upper surface of the partition 1013, and the packaging box 103 is formed with a space for accommodating the phase change material 104. The packaging box 103 is filled with the phase change material 104. Of course, in order to prevent the phase change material 104 from flowing out, a thermal conductive adhesive can also be used for packaging and filling the through hole on the partition 1013 for the heat conductive sheet 105 to pass through. The heat conductive sheet 105 is at least embedded in the phase change material 104, and the heat conductive sheet is in contact with the bus cover 200 after passing through the partition 1013; the bus cover 200 can be fixedly connected with the partition 1013. In this way, the heat of the pad 203 mainly comes from the mesh plate 201, and the heat conductive plate transfers the heat of the mesh plate 201 to the phase change material 104 in the packaging box 103, thereby transferring the heat to the phase change material 104. In this way, when the temperature is too high, the phase change material 104 changes phase to absorb heat, thereby transforming the mesh plate 201 into a heat sink, thereby reducing the temperature of the cushion block 203, so that the cushion block 203 will not overheat and expand, causing the inner slide plate 202 to block the ventilation hole 2011.

[0073] As a preferred solution, in order to achieve a better heat conduction effect, thermal conductive glue or other heat conductive fluids can be appropriately added between the heat conductive sheet 105 and the mesh plate 201 , and between the mesh plate 201 and the pad 203 .

[0074] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A busbar cover, comprising: A mesh plate provided with a plurality of ventilation holes; Two side panels are respectively fixed on two sides of the mesh plate; The mesh plate and two side plates enclose a space for accommodating the busbar; Features: The busbar cover also includes: An inner slide plate is provided with a plurality of inner plate holes; A spacer, made of at least a silicone material; Among them, the inner slide plate is slidably connected to the mesh plate; a placement groove is formed or connected to the inner side of the mesh plate; a pad is arranged in the placement groove; the bottom of the inner slide plate contacts the top of the pad so that the pad changes the relative position between the inner plate hole and the ventilation hole when the pad expands and contracts due to heat and cold.

2. The busbar cover according to claim 1, characterized in that: The inner slide plate and the mesh plate form a sliding connection in a vertical direction.

3. The busbar cover according to claim 2, characterized in that: The busbar cover also includes: The inner plate slide rail is fixedly arranged on the inner side of the mesh plate; The inner slide plate is arranged between the two inner plate slide rails and is at least partially embedded in the two inner plate slide rails.

4. The busbar cover according to claim 1, characterized in that: The busbar cover also includes: A slot block, formed with the placement slot; The slot block is fixedly connected to the inner side of the inner slide plate.

5. The busbar cover according to claim 4, characterized in that: A notch for placing the trough is arranged on the top of the trough body.

6. The busbar cover according to claim 1, characterized in that: The busbar cover comprises a plurality of pads, and the plurality of pads are arranged at intervals.

7. The busbar cover according to claim 1, characterized in that: The ventilation hole is constructed to have an arc-shaped contour; the inner plate hole is constructed to have an arc-shaped contour with a curvature direction opposite to that of the arc-shaped contour of the ventilation hole.

8. The busbar cover according to claim 1, characterized in that: The ventilation holes are aligned with the inner plate holes in the horizontal direction.

9. A low voltage cabinet, comprising: The cabinet and several busbars arranged therein; Features: The low voltage cabinet also includes: The busbar cover according to any one of claims 1 to 8, wherein the busbars are accommodated in the busbar cover.

10. The low voltage cabinet according to claim 9, characterized in that: The low voltage cabinet also includes: Phase change materials; A packaging box is formed with a space for accommodating the phase change material; a thermally conductive sheet at least partially embedded in the phase change material; A partition is fixedly arranged inside the cabinet; The packaging box is fixed on the upper surface of the partition; the heat conducting sheet is in contact with the busbar cover after passing through the partition; and the busbar cover is fixedly connected with the partition.

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