Equipment case capable of realizing directional explosion venting and inverter

Abstract

The utility model relates to an equipment case capable of achieving directional explosion venting and an inverter, the equipment case comprises a case wall used for limiting the internal space of the equipment case, and a part of the case wall serves as an explosion venting piece; the box wall is provided with a hollowed-out belt, the hollowed-out belt half surrounds the explosion venting piece, and the explosion venting piece has a pressure relief state in which the explosion venting piece is pressed to be folded outwards. The equipment case is provided with the explosion venting piece integrated with the case wall, directional explosion venting can be achieved when the case explodes, the case cover is prevented from being separated, damage to other equipment and potential safety hazards of maintenance personnel are reduced, and meanwhile the structure is simple and cost is low.

Description

Technical Field

[0001] This application relates to the field of electrical equipment, and in particular to a device enclosure and inverter with directional explosion venting capability. Background Technology

[0002] Currently, electronic enclosure equipment such as inverters and converters are prone to explosion when their internal components fail. In the event of an explosion, structural components on the enclosure, such as the cover (door), may fall off and pop out due to the blast impact, posing a significant risk to the life safety of maintenance personnel or the operation of other equipment.

[0003] While existing technologies include explosion relief methods such as safety valves and explosion relief discs, these methods increase the complexity of the structure and the cost of processing and assembly. Therefore, how to balance structure and cost and solve this safety hazard has become an urgent problem for those skilled in the art. Utility Model Content

[0004] This application provides a simple and easy-to-assemble equipment enclosure. The explosion relief vent installed on the enclosure wall can release instantaneous high pressure, prevent the enclosure cover from falling off, and reduce safety hazards.

[0005] This application discloses a device enclosure for directional explosion venting, including an enclosure wall for defining the internal space of the device enclosure, wherein a portion of the enclosure wall itself serves as an explosion venting plate;

[0006] The box wall has a perforated strip, which partially surrounds the explosion relief plate, and the explosion relief plate has a pressure-relieving state where it folds outward under pressure.

[0007] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0008] In one embodiment, the perforated portion of the perforated strip is a strip-shaped hole, the strip-shaped hole is aligned with the extension direction of the perforated strip, the strip-shaped hole is one or multiple strip-shaped holes arranged at intervals, and the connecting rib that breaks under pressure relief is between two adjacent strip-shaped holes; the equipment chassis also includes a sealing element to close the perforated portion.

[0009] In one embodiment, the connecting rib has a strength-reducing portion, and the strength-reducing portion is arranged in at least one of the following ways:

[0010] Method a) The shape of the connecting rib locally converges;

[0011] Method b) The end of the connecting rib has a cut at the connection point between it and the two sides of the hollow strip.

[0012] In one embodiment, 5 to 10 connecting ribs are arranged at intervals along the extension direction of the hollow strip.

[0013] In one embodiment, the sealing element is a preform attached to the perforated strip and / or the sealing element is formed in situ on the perforated strip.

[0014] In one embodiment, the perforated portion of the perforated strip is a series of spaced holes, and the equipment chassis further includes a sealing element that closes the holes and is formed in situ in the holes.

[0015] In one embodiment, the holes are arranged sequentially or alternately along the extension direction of the perforated strip; the shape of the holes is selected from at least one of polygons, circles, and ellipses, wherein the polygons have 3 to 8 sides.

[0016] In one embodiment, the box wall has opposing inner and outer sides, and the inner and / or outer sides of the box wall are provided with limiting members arranged around the perforated strip to limit the edge position of the seal.

[0017] In one embodiment, the width of the perforated strip is 1.8mm to 2.2mm.

[0018] In one embodiment, the enclosure wall includes a plurality of sidewalls facing different directions, wherein at least one sidewall is provided with the explosion relief plate, and the explosion relief plate in the same sidewall is one or a plurality of them arranged at intervals.

[0019] In one embodiment, the ratio of the area of ​​the venting disc to the area of ​​the sidewall is greater than or equal to 0.4.

[0020] In one embodiment, the shape of the vent is selected from at least one of quadrilateral, triangle, and semicircle.

[0021] In one embodiment, the outer periphery of the explosion relief disc includes a first edge and a second edge that are joined end to end. In the depressurized state, the first edge separates from the adjacent part of the box wall, and the explosion relief disc folds at the second edge. The first edge has a tendency to extend closer to each other at the parts adjacent to its two ends.

[0022] In one embodiment, the first edge has opposing extensions at its two ends, and the second edge is located between the two opposing extensions; the length of the second edge is L2, and the total length of the second edge and the two opposing extensions is L1, and L2:L1 is less than or equal to 0.6.

[0023] This application also provides an inverter having the directional explosion-proof equipment chassis described in this application.

[0024] The equipment enclosure of this application is equipped with an explosion vent integrated with the enclosure wall, which can vent the explosion in a directional manner in the event of an explosion, preventing the enclosure cover from falling off, reducing damage to other equipment and safety hazards to maintenance personnel, while also having a simple structure and low cost. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a perspective view of the enclosure of a device capable of directional explosion venting according to an embodiment of this application;

[0027] Figure 2 for Figure 1 Front view of the equipment chassis;

[0028] Figure 3 for Figure 2 Enlarged view of part B in the middle;

[0029] Figure 4 This is a schematic diagram of a connecting rib in the equipment chassis according to another embodiment of this application;

[0030] Figure 5 This is a schematic diagram of a connecting rib in the equipment chassis according to another embodiment of this application;

[0031] Figure 6 This is a schematic diagram of a connecting rib in the equipment chassis according to another embodiment of this application;

[0032] Figure 7 for Figure 1 Sectional view of AA;

[0033] Figure 8 for Figure 7 Enlarged view of the middle C section;

[0034] Figure 9 for Figure 8 A schematic diagram showing the addition of a seal.

[0035] Figure 10 This is a schematic diagram of a cutout strip in the device chassis according to another embodiment of this application;

[0036] Figure 11 This is a schematic diagram of a cutout strip in the device chassis according to another embodiment of this application;

[0037] Figure 12This is a schematic diagram of a cutout strip in the device chassis according to another embodiment of this application;

[0038] Figure 13 This is a schematic diagram of a cutout strip in the device chassis according to another embodiment of this application;

[0039] Figure 14 This is a schematic diagram of a venting diaphragm in the device chassis according to another embodiment of this application;

[0040] Figure 15 This is a schematic diagram of a venting diaphragm in the device chassis according to another embodiment of this application;

[0041] Figure 16 This is a schematic diagram of a venting diaphragm in the device chassis according to another embodiment of this application.

[0042] The component labels are as follows:

[0043] 100. Box wall; 110. Box lid; 120. Side wall; 130. Perforated strip; 131. Strip hole; 132. Connecting rib; 1321. Narrowing section; 1322. Cutout; 133. Hole; 140. Explosion relief disc; 141. First edge; 1411. Opposing extension section; 142. Second edge;

[0044] 200. Sealing components;

[0045] 300. Limiting components. Detailed Implementation

[0046] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0047] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0048] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this application, unless otherwise expressly 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 and the second feature are in indirect contact 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 (or in a usage state, or from a certain viewpoint in the drawing) than the second feature. "Below," "below," and "under" 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 (or in a usage state, or from a certain viewpoint in the drawing) than the second feature.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0051] See Figure 1 and Figure 2 One embodiment of this application provides a directional explosion-proof equipment enclosure, including enclosure walls 100 for defining the internal space of the equipment enclosure, depending on the overall shape of the equipment enclosure (e.g., Figure 1 The enclosure wall 100 (roughly cubic in shape) may include multiple side walls located on the top, bottom and all sides depending on the orientation. One side wall may serve as a cover 110 in whole or in part. A part of the enclosure wall 100 itself also serves as a pressure relief disc 140. When the pressure inside the equipment enclosure is too high, the pressure relief disc 140 will partially detach from the adjacent parts and fold outward to release pressure, which can quickly release pressure to protect the equipment.

[0052] In order to guide the pressure relief disc 140 to fold outward under pressure, a part of one side wall 120 is locally treated to reduce structural strength, that is, it has a hollow strip 130. The hollow strip 130 partially surrounds the pressure relief disc 140, allowing the pressure relief disc 140 to fold outward under pressure, and also preventing the pressure relief disc 140 from falling off directly.

[0053] The explosion relief disc 140 can be installed on each side wall, preferably on the side wall 120 facing the opposite direction to the cover 110, so as to avoid injury to the workers on the side of the cover 110 during explosion relief. For example, the explosion relief disc 140 can be installed on the adjacent side of the cover 110.

[0054] In this embodiment, the pressure relief disc 140 and the side wall 120 are integrally formed, eliminating the need for additional pressure relief components. This avoids the assembly process of pressure relief components in the prior art, making it easier to process and reducing costs.

[0055] When the explosion relief disc 140 has a sufficient area, it can achieve rapid pressure relief and improve protection performance. For example, the ratio of the area of ​​the explosion relief disc 140 to the area of ​​the side wall 120 is greater than or equal to 0.4. Figure 2 As can be seen, the equipment chassis has a height H1, the explosion relief disc 140 has a height H2, and the ratio of H2 to H1 is not less than 0.6. The explosion relief disc 140 has a length L1, and the equipment chassis has a width W, and the ratio of L1 to W is not less than 0.8.

[0056] The outer periphery of the explosion relief disc 140 includes a first edge 141 and a second edge 142 that are joined end to end. Under depressurization conditions, the first edge 141 separates from the adjacent portion of the housing wall 100, and the explosion relief disc 140 folds over at the second edge 142. The first edge 141 corresponds to the location of the perforated strip 130, and the second edge 142 (as shown in the image)... Figure 2 (As shown by the dotted line) The original strength of the box wall 100 is preserved, or at least the connection strength should be greater than that of the first edge 141. The second edge 142 does not break under the pressure relief state and can be pulled and guided to fold the explosion relief piece 140 as a whole.

[0057] In this embodiment, in order to further optimize the overall stress on the equipment chassis under depressurization conditions, the second edge 142 of the explosion relief plate 140 is located on the side of the side wall 120 away from the cover 110, and the first edge 141 is located on the side adjacent to the cover 110 relative to the second edge 142.

[0058] In one embodiment, to further guide the folding of the pressure relief disc 140 and rapidly release pressure, the first edge 141 has a tendency to extend closer to each other at portions adjacent to its two ends, for example... Figure 2 As can be seen, the first edge 141 has opposing extension segments 1411 near its two ends, and the second edge 142 is located between the two opposing extension segments 1411. In order to balance the connection strength and the folding effect of the explosion relief piece 140, the length of the second edge 142 in this embodiment is L2, and the total length of the second edge 142 and the two opposing extension segments 1411 is L1, and L2:L1 is less than or equal to 0.6.

[0059] The perforated strip 130 is generally slit-shaped and extends around the outer periphery of the explosion relief piece 140. The width of the perforated strip 130 can be 1.8mm to 2.2mm. A suitable width can reduce the difficulty of processing and sealing.

[0060] Combination Figures 3-6 In one embodiment, the perforated portion of the perforated strip 130 is a strip-shaped hole 131. The strip-shaped hole 131 extends in the same direction as the perforated strip 130. There may be one or multiple strip-shaped holes 131 spaced apart. Between adjacent strip-shaped holes 131 is a connecting rib 132 that breaks under pressure relief. The number of connecting ribs 132 can be set according to the pressure relief and the corresponding connection strength. For example, along the extension direction of the perforated strip 130, 5 to 10 connecting ribs 132 are spaced apart. Figure 2 For example, in one embodiment, seven connecting ribs 132 are arranged at intervals.

[0061] In one embodiment, the connecting rib 132 has a strength-reducing portion, which is arranged in at least one of the following ways:

[0062] Method a) The connecting rib 132 locally converges to form a narrowed section 1321. Figure 3 In the embodiment, the area to be resected by convergence is trapezoidal; Figure 4 In the embodiment, the area to be resected is rectangular. Figure 5 In one embodiment, the area to be resected is triangular.

[0063] Method b) Figure 6 In one embodiment, the end of the connecting rib 132 and the connection part between the two sides of the hollow strip 130 have a cut 1322.

[0064] By improving the shape of the connecting rib 132, a stable connection between the connecting rib 132 and both sides of the strip hole 131 can be ensured, unnecessary breakage can be avoided, or the processing difficulty can be reduced and the synchronous breakage effect during explosion venting can be achieved.

[0065] To achieve a proper internal sealing effect for the equipment chassis, a sealing element 200 can be installed to seal the perforated area. The sealing element 200 can be prefabricated as a sealing strip and applied to the perforated strip 130, or a curable material (e.g., sealant) can be directly applied to the perforated strip 130, thus achieving in-situ molding of the sealing element 200 within the perforated strip 130. Alternatively, both methods can be combined, i.e., the sealing strip can be bonded and fixed to the perforated strip 130 using a curable material.

[0066] See Figures 7-9To facilitate construction and limit the edge position of the seal 200, in one embodiment, the box wall 100 has opposing inner and outer sides, and the inner and / or outer sides of the box wall 100 are provided with limiting members 300 arranged around the perforated strip 130. For example, the limiting members 300 are paired strip-shaped components and fixed to both sides of the perforated strip 130, which can limit and protect the seal 200.

[0067] See Figures 10-13 In some embodiments, the perforated portion of the perforated strip 130 consists of spaced holes 133. When the cured material is used as a sealant 200 to seal these holes 133, the overflow of the cured material can be avoided, making construction easier.

[0068] Figure 10 In one embodiment, the holes 133 are rectangular (or rhomboid, etc.) and are arranged sequentially along the extension direction of the perforated strip 130.

[0069] Figure 11 In one embodiment, the holes 133 are circular (or elliptical, etc.) and are arranged sequentially along the extension direction of the perforated strip 130.

[0070] Figure 12 In one embodiment, the holes 133 are hexagonal and arranged sequentially along the extension direction of the perforated strip 130.

[0071] Figure 13 In one embodiment, the holes 133 are rectangular and are staggered along the extension direction of the perforated strip 130.

[0072] In the equipment enclosure of this application, the enclosure wall 100 includes multiple side walls facing different directions, wherein at least one side wall 120 is provided with a venting fin 140, and the venting fin 140 in the same side wall 120 is one or multiple venting fins arranged at intervals.

[0073] Figure 14 In the embodiment, there are two explosion relief discs 140 in the same sidewall 120, both of which are rectangular. In the two explosion relief discs 140, the first edge 141 of each disc is located on the side that is close to each other, and the second edge 142 is located on the side that is far away from each other. In the depressurization state (the first edge 141 is indicated by a dashed line), the two explosion relief discs 140 are turned outwards and far away from each other, which can avoid interference.

[0074] Figure 15 In one embodiment, the explosion relief disc 140 is semi-circular, with the dashed line indicating the first edge 141 and the solid line indicating the second edge 142.

[0075] Figure 16 In one embodiment, the explosion relief disc 140 is triangular, with the dashed line indicating the first edge 141 and the solid line indicating the second edge 142.

[0076] In one embodiment, this application also provides an inverter that may have the device chassis of any of the embodiments described above.

[0077] The equipment enclosure of this application can directionally release pressure through an explosion relief vent integrated with the enclosure wall. It has a simple structure, is easy to process, and can be flexibly configured for different usage scenarios.

[0078] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0079] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A directional explosion-proof equipment enclosure, comprising enclosure walls for defining the internal space of the equipment enclosure, characterized in that, A portion of the enclosure wall itself serves as a venting plate; The box wall has a perforated strip, which partially surrounds the explosion relief plate, and the explosion relief plate has a pressure-relieving state where it folds outward under pressure.

2. The equipment chassis according to claim 1, characterized in that, The hollowed-out portion of the hollowed-out strip is a strip-shaped hole, which extends in the same direction as the hollowed-out strip. There is one or multiple strip-shaped holes arranged at intervals, and there is a connecting rib that breaks under pressure relief between two adjacent strip-shaped holes. The equipment chassis also includes a seal that closes the hollowed-out area.

3. The equipment chassis according to claim 2, characterized in that, The connecting rib has a strength-weakening section, and the strength-weakening section is arranged in at least one of the following ways: Method a) The shape of the connecting rib locally converges; Method b) The end of the connecting rib has a cut at the connection point between it and the two sides of the hollow strip.

4. The equipment chassis according to claim 2, characterized in that, Along the extension direction of the hollowed-out strip, there are 5 to 10 connecting ribs arranged at intervals.

5. The equipment chassis according to claim 2, characterized in that, The sealing element is a prefabricated part that is attached to the perforated strip and / or the sealing element is formed in situ on the perforated strip.

6. The equipment chassis according to claim 1, characterized in that, The perforated portion of the perforated strip consists of spaced holes, and the equipment chassis also includes a sealing element that closes the holes and is formed in situ within the holes.

7. The equipment chassis according to claim 6, characterized in that, The holes are arranged sequentially or alternately along the extension direction of the hollowed-out strip; The shape of the hole is selected from at least one of polygon, circle, and ellipse, wherein the polygon has 3 to 8 sides.

8. The equipment chassis according to claim 2 or 6, characterized in that, The box wall has opposing inner and outer sides, and the inner and / or outer sides of the box wall are provided with limiting members arranged around the perforated strip to limit the edge position of the seal.

9. The equipment chassis according to claim 1, characterized in that, The width of the hollowed-out strip is 1.8mm to 2.2mm.

10. The equipment chassis according to claim 1, characterized in that, The enclosure wall includes multiple sidewalls facing different directions, at least one of which is provided with the explosion relief plate, and the explosion relief plate in the same sidewall is one or multiple plates arranged at intervals.

11. The equipment chassis according to claim 10, characterized in that, The ratio of the area of ​​the explosion relief disc to the area of ​​the sidewall it is located in is greater than or equal to 0.

4.

12. The equipment chassis according to claim 1, characterized in that, The shape of the explosion relief disc is selected from at least one of quadrilateral, triangle, and semicircle.

13. The equipment chassis according to claim 1, characterized in that, The outer periphery of the explosion relief disc includes a first edge and a second edge that are connected end to end. Under depressurization conditions, the first edge separates from the adjacent part of the box wall, and the explosion relief disc folds at the second edge. The first edge has a tendency to extend closer to each other in the regions adjacent to its two ends.

14. The equipment chassis according to claim 13, characterized in that, The first edge has opposing extensions at its two ends, and the second edge is located between the two opposing extensions. The length of the second edge is L2, and the total length of the second edge and the two opposing extension segments is L1, and L2:L1 is less than or equal to 0.

6.

15. An inverter, characterized in that, The inverter has a directional explosion-proof equipment chassis as described in any one of claims 1 to 9.

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