Electrical cabinet

Abstract

The utility model relates to the technical field of energy storage equipment, and discloses an electrical cabinet which comprises a box body, a pressure relief plate and a shielding piece, and the pressure relief plate and the shielding piece are both arranged on the box body. Wherein the box body is provided with a containing cavity and a pressure relief opening communicated with the containing cavity, and the pressure relief plate is arranged on one side of the pressure relief opening in a turnover mode. The pressure relief plate has a closed posture and an open posture, in the closed posture, the pressure relief plate covers the pressure relief opening to seal the pressure relief opening, and in the open posture, an opening is formed between the pressure relief plate and the pressure relief opening. One end of the shielding piece is connected with the box body, the other end of the shielding piece is connected with the pressure relief plate, the shielding piece can be folded so that the shielding piece can correspondingly form an unfolded state and a folded state along with closing and opening of the pressure relief plate, and in the unfolded state, the shielding piece is unfolded to partially shield the opening. According to the scheme, the direction and area of flame ejection can be controlled on the premise that the top space is not sacrificed, so that the flame influence range is reduced, and the protection performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical cabinet safety protection, and in particular to an electrical cabinet. BACKGROUND

[0002] An electrical cabinet is a facility mainly used for installing, protecting and controlling electrical equipment, and has functions of protection and isolation. According to different focuses, the electrical cabinet can be divided into control cabinets, communication cabinets, energy storage cabinets and the like. Since various electrical devices are generally integrated in the electrical cabinet, more attention is paid to the safety protection performance of the electrical cabinet.

[0003] In the related art, a venting device is arranged at the top of the electrical cabinet, and the venting device usually includes a venting opening and a venting plate. When the electrical cabinet is on fire and causes thermal runaway, the flame or pressure breaks through the venting plate and is discharged from the energy storage box.

[0004] However, in the related art, when the flame is discharged from the venting opening, the flame is sprayed in all directions, which may cause the flame to spread to the surrounding area of the venting opening, thereby causing a chain effect on the surrounding area of the venting opening, which is not conducive to safety protection. CONTENT OF THE INVENTION

[0005] The present application provides an electrical cabinet to reduce the influence on the surrounding area when the flame is discharged from the venting opening.

[0006] An electrical cabinet includes:

[0007] a cabinet body having a receiving cavity and a pressure relief opening, the pressure relief opening being in communication with the receiving cavity;

[0008] a pressure relief plate reversibly arranged on one side of the pressure relief opening, having a closed attitude and an open attitude, in the closed attitude, the pressure relief plate covers the pressure relief opening to close the pressure relief opening, in the open attitude, an opening is formed between the pressure relief plate and the pressure relief opening; and

[0009] a shielding piece, one end of the shielding piece being connected with the cabinet body, the other end of the shielding piece being connected with the pressure relief plate, the shielding piece being foldable so that the shielding piece can form an unfolded state and a folded state corresponding to the closing and opening of the pressure relief plate;

[0010] In the unfolded state, the shielding piece is unfolded to partially shield the opening.

[0011] According to the technical scheme, in the opened posture of the pressure relief plate, the flame is partially blocked by the shielding piece, so that the flame can only be sprayed towards the unblocked area, thereby effectively limiting the direction and range of the flame spray, and the position and area of the opening blocked by the shielding piece can be designed according to requirements to reduce the spread of the flame towards important areas, thereby improving the safety protection performance. The important area in the above-mentioned refers to an area that does not want to be affected by the flame, for example, adjacent cabinets, important devices around the cabinet, and the like. In the closed posture of the pressure relief plate, the pressure relief plate closes the pressure relief opening, and the shielding piece is in a folded state, thereby saving the occupied space and not affecting the overall layout. Therefore, the scheme can flexibly control the direction and area of the flame spray without sacrificing the top space, so as to reduce the influence range of the flame and improve the protection performance.

[0012] As an optional embodiment provided by the present application, the shielding piece includes a fireproof cloth.

[0013] According to the technical scheme, the flexible material is convenient to install, and the occupied space is small in the folded state.

[0014] As an optional embodiment provided by the present application, the cabinet has a mounting surface, the pressure relief opening is arranged on the mounting surface, the mounting surface has opposite first and second edge lines, the pressure relief opening is arranged closer to the second edge line than to the first edge line, the pressure relief opening has a separation side closer to the second edge line and a connection side away from the second edge line, and the pressure relief plate is reversibly arranged on the connection side.

[0015] According to the technical scheme, the pressure relief plate is reversibly arranged on the connection side, that is, the side of the pressure relief opening closer to the center of the mounting surface, so that the pressure relief plate can reduce the spread of the flame towards the center of the mounting surface, and when there is no other equipment around the cabinet, the setting can reduce the influence of the flame on the cabinet itself.

[0016] As an optional embodiment provided by the present application, the fireproof cloth includes a first part, one end of the first part is connected to the separation side, the other end of the first part is connected to the pressure relief plate, and the first part is provided with a through opening. In the opened posture of the pressure relief plate, the through opening has a spacing from the mounting surface.

[0017] According to the technical scheme, the first part is arranged on the side of the connection side closer to the separation side, so that the first part can shield the spray area of the flame towards the outside of the cabinet, thereby reducing the spread of the flame towards the adjacent cabinet and reducing the associated influence on the adjacent cabinet. In addition, the through opening has a spacing from the surface of the cabinet, so that the position of the flame spray has a spacing from the surface of the cabinet, and the flame is more difficult to contact the surface of the cabinet, thereby increasing the heat transfer distance to reduce the case of cabinet temperature rise caused by flame roasting.

[0018] As an optional embodiment provided by the present application, the pressure relief port further has a transition side connected between the same end of the separation side and the connection side, and the fireproof cloth includes a second part, one end of the second part being connected with the pressure relief plate, and the other end of the second part being connected with the transition side.

[0019] The above technical solution is implemented, in the opened posture of the pressure relief plate, the first part shields the side region of the opening facing the outside of the cabinet, and the second part shields the region of the opening facing the two transition sides, so as to completely enclose and shield the entire opening, and the through opening on the first part becomes the only region for flame ejection. This setting causes the flame ejection region to be away from the surface of the cabinet, which makes it more difficult for the flame to spread or diffuse to the surface of the cabinet, thereby reducing the spread of the flame towards the region of the cabinet itself and the spread of the flame towards the region outside the cabinet, and overall reducing the impact on the surrounding region. It should be noted that reducing the impact can be understood as, under normal circumstances, the impact of the flame on the surrounding region is caused by the large fire or the spread of the fire with the help of the wind, which causes the flame to contact the surface of the cabinet or the surrounding equipment, and the high temperature caused by the baking causes damage to the related parts. However, the above scheme can cause the through opening for flame ejection to be away from the surface of the cabinet when the shielding piece is in the unfolded state, thereby reducing the impact of the flame on the cabinet itself and the surrounding region.

[0020] As an optional embodiment provided by the present application, the shielding piece further includes a framework, one end of the framework being connected with the cabinet, and the other end of the framework being connected with the pressure relief plate, the framework being foldable to form an unfolded state and a folded state following the pressure relief plate, and the fireproof cloth being connected between any two or any three of the framework, the pressure relief plate, and the pressure relief port.

[0021] The above technical solution is implemented, in the unfolded state of the framework, the fireproof cloth is supported to be in the unfolded state, which makes the forming effect of the fireproof cloth better when the pressure relief plate is opened, the through opening is formed more stably, and the flame ejected through the through opening is more stable and reliable, facilitating the stable and rapid discharge of the flame and pressure.

[0022] As an optional embodiment provided by the present application, the framework includes a first frame, a second frame, and a third frame, which are sequentially arranged outside the pressure relief port from inside to outside, the first frame and the second frame are both rotationally arranged on the connection side, and the rotation axes of the first frame and the second frame are coaxial with the rotation axis of the pressure relief plate, and the third frame is fixedly connected with the cabinet.

[0023] The first frame is fixedly connected with the pressure relief plate, the framework further includes a connecting rod assembly, and the connecting rod assembly is arranged between the first frame and the second frame to drive the second frame to flip when the first frame flips.

[0024] To achieve the above technical solution, a specific skeleton structure is proposed. The skeleton is configured as a first frame, a second frame, and a third frame from the inside out. This allows the first, second, and third frames to directly contact the surface of the enclosure after folding, thus enabling the overall height of the skeleton to be kept low, effectively saving space. When the pressure relief plate flips, it causes the first frame to flip along with it. The first frame then drives the second frame to flip via a linkage assembly, making the opening of the skeleton smoother.

[0025] As an optional embodiment provided in this application, the linkage assembly includes:

[0026] The first connecting rod is hinged at one end to the side of the first frame near the connection side;

[0027] The second link, one end of which is hinged to the third frame on the side near the connection point; and,

[0028] The adjustment protrusion is located on the second connecting rod;

[0029] The first connecting rod and the other end of the second connecting rod are hinged to each other. The second frame has an adjustment groove extending along the rotation axis perpendicular to the pressure relief plate, and the adjustment protrusion slides in the adjustment groove.

[0030] To achieve the above technical solution, the linkage process between the first and second frames is as follows: the pressure relief plate flips, causing the first frame to flip, which in turn causes the second connecting rod and the first connecting rod to flip simultaneously. This causes the adjusting protrusion to follow the second connecting rod in an arc motion around the hinge point of the second connecting rod. Furthermore, due to the constraint of the adjusting groove, the adjusting protrusion slides within the adjusting groove, thereby causing the second frame to flip. This linkage structure requires less effort and the flipping process is smoother.

[0031] As an optional embodiment provided in this application, the fireproof cloth includes a first part, one end of which is connected to the second frame, and the other end of which is connected to the separation side.

[0032] As an optional embodiment provided in this application, the fireproof cloth includes a second part, one end of which is connected to the transition side, and the other end of which is connected to the pressure relief plate.

[0033] To achieve the above technical solution, a shielding component including a frame and a fireproof cloth is proposed. The frame can provide stable support, making the unfolded and folded states of the fireproof cloth more regular, thereby improving its flexibility of use.

[0034] As an optional embodiment provided in this application, there are accommodating gaps between the first frame and the second frame, and between the second frame and the third frame. When the shielding member is folded, the fireproof cloth is placed in the accommodating gap.

[0035] The accommodation gap is arranged to place part of the fireproof cloth in the folded state, so that the fireproof cloth is regularly and limitedly acted on in the folded state, so as to ensure that the shielding piece is more orderly and orderly in the folded state.

[0036] As an optional embodiment provided by the present application, a limiting piece is arranged on the first frame, and the limiting piece includes a limiting plate. The limiting plate is arranged on the side of the first frame away from the cabinet, and extends towards the direction away from the pressure relief plate. When the shielding piece is in the folded state, the limiting plate is located on the side of the fireproof cloth away from the cabinet.

[0037] The above technical solution can constrain and limit the fireproof cloth by the limiting plate when the shielding piece changes from the unfolded state to the folded state, which is beneficial to the folding of the flange and the storage in the folding process.

[0038] As an optional embodiment provided by the present application, the limiting piece further includes a transition plate connected with the limiting plate. The transition plate is protruded on the side of the first frame away from the cabinet, and the limiting plate is connected to the side of the transition plate away from the first frame.

[0039] One of the above technical solutions has the following advantages or beneficial effects:

[0040] When the pressure relief plate is in the open posture, part of the area where the flame is sprayed is blocked due to the shielding piece shielding the opening, which makes the flame only spray towards the unblocked area, thereby effectively restricting the direction and range of the flame spray. The position and area of the shielding piece shielding the opening can be designed according to the demand to reduce the spread of the flame towards the important area, thereby improving the safety protection performance. The important area in the above refers to the area that does not want to be affected by the flame, such as adjacent cabinets, important devices around the cabinet, etc. When the pressure relief plate is in the closed posture, the pressure relief plate closes the pressure relief port, and the shielding piece is in the folded state, thereby saving the occupied space and not affecting the overall layout. Therefore, the present application can flexibly control the direction and area of the flame spray without sacrificing the top space, so as to reduce the influence range of the flame and improve the protection performance. BRIEF DESCRIPTION OF DRAWINGS

[0041] The technical solutions and other beneficial effects of the present application will be apparent from the detailed description of the specific embodiments of the present application combined with the accompanying drawings.

[0042] Figure 1 is the overall structure diagram of the electrical cabinet provided by the embodiment of the present application;

[0043] Figure 2 is the structure diagram of the present application without including the shielding piece;

[0044] Figure 3is a partial structure diagram of a shielding piece provided by an embodiment of the present application;

[0045] Figure 4 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application;

[0046] Figure 5 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application; Figure 4 is a partial enlarged view of part A in the figure;

[0047] Figure 6 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application;

[0048] Figure 7 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application;

[0049] Figure 8 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application;

[0050] Figure 9 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application;

[0051] Figure 10 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application;

[0052] Figure 11 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application;

[0053] Figure 12 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application;

[0054] Figure 13 is a schematic diagram for showing the mounting structure of the pressure relief plate and the box provided by an embodiment of the present application;

[0055] Reference signs: 1, box; 10, accommodating cavity; 100, pressure relief port; 101, connecting side; 102, separating side; 103, transition side; 1000, mounting surface; 1001, first edge line; 1002, second edge line;

[0056] 2, pressure relief plate; 20, opening; 21, soft plate;

[0057] 3, shielding piece;

[0058] 31, fireproof cloth; 311, first part; 312, second part; 310, through opening; 31a, base end; 31b, turning end;

[0059] 32, skeleton; 321, first frame; 322, second frame; 3220, adjusting groove; 323, third frame; 3231, fixed edge; 324, connecting rod assembly; 3241, first connecting rod; 3242, second connecting rod; 3243, adjusting protrusion;

[0060] 4, flange interface; 5, accommodation gap; 6, sealing layer;

[0061] 7, limiting piece; 71, limiting plate; 72, transition plate;

[0062] 91, sealing plate; 911, weak part; 92, edge pressing frame; 93, reinforcing sheet;

[0063] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0065] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the term "and / or" in this paper is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents an "or" relationship between the associated objects without special explanation.

[0066] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Figures 1-13 The present application is further described.

[0067] Reference Figures 1-3 An electrical cabinet disclosed by the present application includes a box body 1, a pressure relief plate 2 and a shielding piece 3, and the pressure relief plate 2 and the shielding piece 3 are arranged on the box body 1. The box body 1 has a receiving cavity 10 and a pressure relief opening 100 communicating with the receiving cavity 10, and the pressure relief plate 2 is arranged on one side of the pressure relief opening 100.

[0068] The pressure relief plate 2 has a closed attitude and an open attitude. In the closed attitude, the pressure relief plate 2 covers the pressure relief opening 100 to close the pressure relief opening 100, and in the open attitude, an opening 20 is formed between the pressure relief plate 2 and the pressure relief opening 100.

[0069] One end of the shielding piece 3 is connected with the box body 1, and the other end of the shielding piece 3 is connected with the pressure relief plate 2. The shielding piece 3 can be folded so as to correspond to the opening and closing of the pressure relief plate 2 to form an unfolded state and a folded state. In the unfolded state, the shielding piece 3 is unfolded to partially shield the opening 20.

[0070] In the embodiment, when the pressure relief plate 2 is in the open posture, the flame ejection area is partially blocked by the shielding piece 3 due to the shielding of the opening 20 by the shielding piece 3. This makes the flame only eject towards the unblocked area, thereby effectively restricting the direction and range of the flame ejection. The position and area of the shielding opening 20 of the shielding piece 3 can be designed according to the requirements to reduce the spread of the flame towards important areas, thereby improving the safety protection performance. The important areas in the above-mentioned refer to areas that are not expected to be affected by the flame, such as adjacent box bodies 1, important devices around the box body 1, etc. When the pressure relief plate 2 is in the closed posture, the pressure relief plate 2 closes the pressure relief opening 100, and the shielding piece 3 is in the folded state, thereby saving the occupied space and not affecting the overall layout. Therefore, the embodiment can flexibly control the direction and area of the flame ejection according to the requirements without sacrificing the top space of the box body 1, so as to reduce the flame influence range and improve the protection performance.

[0071] More specifically to the embodiment.

[0072] In one example, the box body 1 is in a cubic shape, and the box body 1 has a first direction X, a second direction Y and a third direction Z intersecting with each other, which respectively represent the length direction, the width direction and the height direction of the box body 1. The top surface of the box body 1 in the third direction Z is a mounting surface 100, and the pressure relief plate 2 and the shielding piece 3 are arranged on the mounting surface 100.

[0073] Referring to Figure 2 In one example, the top surface of the box body 1 is provided with a flange interface 4 which is higher than the top surface of the box body 1 by a certain height. This design can further reduce the spread contact of the flame with the surface of the box body 1 and reduce the influence of the flame. The size of the raised part can be designed according to the actual situation, and the main consideration factor is to not occupy the space of the top of the box body 1. The opening of the flange interface 4 forms the pressure relief opening 100 which is in communication with the accommodating cavity 10. It can be understood that in some other optional embodiments, the top surface of the box body 1 can not be provided with the flange interface 4, but the pressure relief opening 100 is directly provided.

[0074] In one example, the pressure relief port 100 is rectangular, the mounting surface 100 has a first edge line 1001 and a second edge line 1002 which are parallel to each other and oppositely arranged in the second direction Y, the pressure relief port 100 is arranged closer to the second edge line 1002 than to the first edge line 1001, in the second direction Y, the pressure relief port 100 has a separation side 102 close to the first edge line 1001 and a connection side 101 away from the first edge line 1001, the pressure relief plate 2 is reversibly arranged on the connection side 101, and the rotation axis of the pressure relief plate 2 is parallel to the first direction X. The pressure relief plate 2 is arranged in a box type, which makes the pressure relief plate 2 have a certain thickness. It should be noted that the connection side 101 refers to the solid structure on the side of the pressure relief port 100 away from the edge of the box body 1, for example, a part on the box body 1 or the flange interface 4, and optionally, in the present embodiment, the connection side 101 refers to the flange interface 4 and the solid structure on the flange interface 4. The same applies to the separation side 102.

[0075] It can be understood that the opening 20 refers to the space left between the peripheral edge of the pressure relief plate 2 and the peripheral side of the pressure relief port 100 after the pressure relief plate 2 is opened around its own rotation axis, i.e., the side of the pressure relief plate 2 close to the separation side 102 gradually moves away from the surface of the box body 1. For the present embodiment, since one side of the pressure relief plate 2 is connected to the connection side 101 of the pressure relief port 100 through the soft plate 21, the sealing effect on the connection side 101 can be achieved, therefore, the opening 20 in the present embodiment refers to the space left between the two sides of the pressure relief plate 2 in the first direction X and the peripheral edge of the pressure relief port 100 close to the separation side 102.

[0076] Specifically, referring to Figure 4 and Figure 5 , the pressure relief plate 2 is connected to the connection side 101 through the soft plate 21 to realize the function of reversible connection, in the present embodiment, the soft plate 21 is integrally connected to the pressure relief plate 2, and the size of the soft plate 21 in the first direction X is greater than or equal to the size of the connection side 101 in the first direction X, therefore, the range of the pressure relief port 100 located in the connection side 101 can be sealed by the soft plate 21. It can be understood that in other optional embodiments, the pressure relief plate 2 and the box body 1 can also be reversibly arranged in other structural forms, for example, using hinge, hinge structure, etc. The soft plate 21 can be metal or non-metal material, and in general, a material that can withstand 1200 degrees high temperature can be selected.

[0077] In one example, referring to Figure 4 and Figure 5In the third direction Z, the flange interface 4 away from the top surface of the cabinet 1 is further provided with a rectangular sealing plate 91, which is a solid plate. The edge of the sealing plate 91 is bolted to the top surface of the flange interface 4 so as to be able to close the pressure relief port 100. This is for sealing purposes, and the setting can avoid the entry of rain, dust and other sundries from the outside into the cabinet 1 during the use of the electrical cabinet. An annular edge pressing frame 92 is arranged on the side of the sealing plate 91 away from the flange interface 4 to fix the edge of the sealing plate 91 on the flange interface 4. Specifically, the edge pressing frame 92 is bolted to the flange interface 4. When the internal pressure of the cabinet 1 reaches a predetermined pressure, the sealing plate 91 will be broken, and the pressure relief plate 2 will be flipped open.

[0078] Back to Figure 2 It should be noted that a reinforcing piece 93 is arranged on the surface of the sealing plate 91 close to the separation side 102. The pressure relief plate 2 is bolted to the reinforcing piece 93 in the closed position, which further ensures the stability and reliability of the pressure relief plate 2 in the closed position. When the pressure relief plate 2 is subjected to high pressure inside the cabinet 1, the connection between the pressure relief plate 2 and the reinforcing piece 93 is disconnected, so that the pressure relief plate 2 is driven to flip.

[0079] In one example, in combination with Figure 6 In order to facilitate the breaking and being broken of the sealing plate 91, a plurality of weak portions 911 are arranged on the sealing plate 91 in the circumferential direction of the sealing plate 91. In this example, the weak portions 911 are formed by slotting the sealing plate 91 to reduce the strength of the corresponding positions. When the heat runaway occurs in the accommodation cavity 10 and the pressure in the accommodation cavity 10 reaches a predetermined pressure, the sealing plate 91 is broken from the weak portions 911, the sealing plate 91 is pushed open or broken, and then the pressure pushes the pressure relief plate 2 to flip around the connection side 101.

[0080] In one example, referring to Figure 4 and Figure 6 In order to improve the sealing performance, an annular sealing layer 6 is arranged on the inner circle of the edge pressing frame 92. Optionally, the sealing layer 6 is formed by curing a sealing glue, or a sealing ring is fixed by adhesion.

[0081] The shielding piece 3 will be described in detail below.

[0082] Referring to Figure 7 and Figure 8 As an optional embodiment provided by the present application, the shielding piece 3 includes a fireproof cloth 31, one end of the fireproof cloth 31 is connected to the cabinet 1, and the other end of the fireproof cloth 31 is connected to the pressure relief plate 2. The fireproof cloth 31 can be folded so that the fireproof cloth 31 can form an unfolded state and a folded state corresponding to the closing and opening of the pressure relief plate 2.

[0083] It should be noted that the one end and the other end of the fireproof cloth 31 in the embodiments of the present application are not two ends along a certain straight direction. For example, in the embodiments, the fireproof cloth 31 has a base end 31a and a turning end 31b, wherein the base end 31a is fixedly connected with the pressure frame 92; and the turning end 31b is fixedly connected with the other side of the pressure relief plate 2 except the hinged side. In this way, the fireproof cloth 31 can be smoothly unfolded when the pressure relief plate 2 is turned. The flexible material is convenient to install, and occupies a small space in the folded state.

[0084] It can be understood that, in the embodiments of the present application, the pressure relief port 100 is arranged at the edge of the mounting surface 1000, and the pressure relief plate 2 is arranged at the connecting side 101, which makes the opening left between the pressure relief plate 2 and the pressure relief port 100 include only three openings, i.e. two openings formed between the two transition sides 103 and the pressure relief plate 2 respectively, and one opening formed between the separation side 102 and the pressure relief plate 2. That is, when the pressure relief plate 2 is in the open position, the pressure relief plate 2 blocks the area of the pressure relief port 100 towards the center of the mounting surface 1000, so as to discharge the flame towards the area away from the center of the mounting surface 1000. When there is no other equipment outside the box body 1 or the other equipment is far away, this setting can reduce the influence of the flame on the box body 1 itself, while not affecting the external equipment.

[0085] And the shielding piece 3 further shields the opening to limit the range of the flame ejection.

[0086] For example, in one example, the fireproof cloth 31 includes a first part 311, one end of the first part 311 is connected to the separation side 102, the other end of the first part 311 is connected to the pressure relief plate 2, and the first part 311 is provided with a through port 310. When the pressure relief plate 2 is in the open position, the through port 310 has a spacing with the mounting surface 1000.

[0087] In the embodiments of the present application, when there is other equipment outside the box body 1, the influence of the flame diffusion should be considered, i.e. reducing the diffusion of the flame towards the outside so as to reduce the influence on the adjacent equipment. Therefore, in the embodiments of the present application, the structure of the fireproof cloth 31 is designed, and the fireproof cloth 31 shields the opening of the side away from the center of the mounting surface 1000, which effectively reduces the influence of the flame on the adjacent equipment.

[0088] And the through port 310 has a spacing with the surface of the box body 1, which makes the position of the flame ejection have a spacing with the surface of the box body 1, so that the flame is more difficult to contact the surface of the box body 1, thereby increasing the heat transfer distance to reduce the case that the box body 1 is heated due to the flame roasting.

[0089] In one example, further, the pressure relief port 100 also has a transition side 103 connected between the separation side 102 and the same end of the connection side 101, the transition side 103 extends along the third direction Y, and in the second direction X, the two transition sides 103 are arranged opposite to each other, and the fireproof cloth 31 includes a second part 312, one end of the second part 312 is connected with the pressure relief plate 2, and the other end of the second part 312 is connected with the transition side 103.

[0090] In the embodiment of the present application, the second part 312 shields the regions on the opposite sides of the opening 20 (see Figure 2 ) in the first direction X, so that the entire opening 20 is enclosed and shielded by the second part 312, and the through hole 310 on the first part 311 becomes the only region where the flame is sprayed, and this setting makes the region where the flame is sprayed away from the surface of the cabinet 1, which makes it difficult for the flame to spread or diffuse to the surface of the cabinet 1, thereby reducing the impact on the surrounding equipment area.

[0091] In the embodiment of the present application, the first part 311 is arranged on the connection side 101 close to the separation side 102, which makes the first part 311 able to shield the region where the flame is sprayed outwards of the cabinet 1, thereby reducing the spread of the flame towards the adjacent cabinet 1 and reducing the impact on the adjacent cabinet 1, and the through hole 310 has a spacing from the surface of the cabinet 1, which makes the position where the flame is sprayed away from the surface of the cabinet 1, so that the flame is more difficult to contact the surface of the cabinet 1, thereby increasing the heat transfer distance to reduce the case of the cabinet 1 being heated by the flame. The second part 312 shields the regions on the opposite sides of the opening 20 (see Figure 2 ) in the first direction X, so that the entire opening 20 is enclosed and shielded by the second part 312, and the through hole 310 on the first part 311 becomes the only region where the flame is sprayed, and this setting makes the region where the flame is sprayed away from the surface of the cabinet 1, which makes it more difficult for the flame to spread or diffuse to the surface of the cabinet 1, thereby reducing the impact on the surrounding area.

[0092] Reducing the impact can be understood as, under normal circumstances, the impact of the flame on the surrounding area is because the fire is large or the flame spreads with the help of the wind, causing the flame to contact the surface of the cabinet 1 or the surrounding cabinet 1 where the pressure relief port 100 is located, and the heat causes the internal temperature of the cabinet 1 to be high, thereby causing the thermal runaway of the battery cells, electrical devices, etc. in the cabinet 1 to spread, and the above scheme can make the through hole 310 where the flame is sprayed away from the surface of the cabinet 1 when the shielding piece 3 is in the unfolded state, thereby reducing the direct contact of the flame with the surface of the cabinet 1 to reduce the roasting of the battery cells and electrical devices in the cabinet 1.

[0093] It should be noted that the shielding piece 3 is only provided as a flexible fireproof cloth 31 to form an independent embodiment, for example, referring to Figure 13In the specific embodiment, the two ends of the fireproof cloth 31 are fixedly connected with the pressure relief plate 2 and the edge frame 92 respectively, and the fixed connection can be bolted connection or adhesive fixing. In an example, one end of the fireproof cloth 31 is bolted with the pressure relief plate 2, and the other end of the fireproof cloth 31 is bolted with the edge frame 92.

[0094] However, there are problems such as irregular folding and unstable support state. Therefore, the shielding piece 3 is further optimized and designed in the embodiments of the present application.

[0095] With reference to Figures 7-9 As an optional embodiment provided by the present application, the shielding piece 3 further comprises a framework 32, one end of the framework 32 is connected with the box body 1, and the other end of the framework 32 is connected with the pressure relief plate 2, the framework 32 is foldable to form an unfolded state and a folded state following the pressure relief plate 2, and the fireproof cloth 31 is covered on the framework 32. Specifically, the fireproof cloth 31 is connected between any two or any three of the framework 32, the pressure relief plate 2 and the pressure relief port 100. In an example, the connection between the fireproof cloth 31, the framework 32, the pressure relief plate 2 and the pressure relief port 100 is screw connection.

[0096] In the present embodiment, the framework 32 supports the fireproof cloth 31 in the unfolded state at the same time, which makes the forming effect of the fireproof cloth 31 better when the pressure relief plate 2 is opened, the through port 310 is formed more stably, and the flame sprayed out of the through port 310 is more stable and reliable, facilitating the stable and rapid discharge of the flame and pressure. The screw connection is convenient for processing and assembly, and the fireproof cloth 31 and the framework 32 are detachably connected, so that the new fireproof cloth 31 can be replaced for maintenance. Moreover, under the limitation of the rigid folding of the framework 32, the fireproof cloth 31 can be folded more regularly and orderly.

[0097] With reference to Figure 8 and Figure 9 As an optional embodiment provided by the present application, the framework 32 comprises a first frame 321, a second frame 322 and a third frame 323 which are sequentially arranged outside the pressure relief port 100 from inside to outside, the first frame 321 and the second frame 322 are both rotationally arranged on the connecting side 101, and the rotation axes of the first frame 321 and the second frame 322 are coaxial with the rotation axis of the pressure relief plate 2, and the third frame 323 is fixedly connected with the box body 1. The first frame 321 is fixedly connected with the pressure relief plate 2, and the framework 32 further comprises a connecting rod assembly 324 arranged between the first frame 321 and the second frame 322, so as to drive the second frame 322 to flip when the first frame 321 flips.

[0098] More specifically, the first frame 321, the second frame 322 and the third frame 323 are all designed as C-shaped frames, and the open ends of the first frame 321, the second frame 322 and the third frame 323 are all located at the connecting side 101 of the pressure relief port 100, the first frame 321 and the second frame 322 are hingedly arranged on the top surface of the flange interface 4, and the third frame 323 is fixedly arranged on the surface of the flange interface 4. Specifically, the third frame 323 extends with a fixed edge 3231 at both ends in the first direction X, and the fixed edge 3231 is pressed on the top surface of the pressure edge frame 92 and is bolted with the flange interface 4.

[0099] Since it has been described in the foregoing that the pressure relief plate 2 has a certain thickness, the first frame 321, the second frame 322 and the third frame 323 are arranged around the outside of the pressure relief plate 2, so that the first frame 321, the second frame 322 and the third frame 323 are directly in contact with the surface of the pressure edge frame 92 after the skeleton 32 is folded, and therefore the height of the entire skeleton 32 can be controlled to be relatively low, thereby effectively saving space occupation. For example, in one example, the height dimension of the skeleton 32 in the third direction Z after being folded is less than the thickness of the pressure relief plate 2.

[0100] Referring to Figure 8 , Figure 9 and Figure 10 , in one example, the linkage assembly 324 includes a first linkage 3241, one end of the first linkage 3241 being hingedly arranged on one side of the first frame 321 close to the connecting side 101; a second linkage 3242, one end of the second linkage 3242 being hingedly arranged on one side of the third frame 323 close to the connecting side 101; and an adjusting protrusion 3243, the adjusting protrusion 3243 being fixedly arranged on the second linkage 3242. Wherein, the other end of the first linkage 3241 and the second linkage 3242 are hingedly arranged with each other, the second frame 322 is provided with an adjusting groove 3220 extending in the second direction Y, and the adjusting protrusion 3243 is slidingly fitted in the adjusting groove 3220.

[0101] The cooperation and linkage process of the first frame 321 and the second frame 322 is as follows: the pressure relief plate 2 is flipped to drive the first frame 321 to flip, and to drive the second linkage 3242 and the first linkage 3241 to flip around their own rotation axes at the same time, which makes the adjusting protrusion 3243 follow the second linkage 3242 to make a circular arc motion around the hinge point of the second linkage 3242, and due to the limitation of the adjusting groove 3220, the adjusting protrusion 3243 slides in the adjusting groove 3220, thereby driving the second frame 322 to flip. The linkage assembly 324 is used to save labor and the flipping process is relatively smooth.

[0102] Referring to Figure 11 and Figure 12As an optional embodiment of the present application, the first frame 321 and the second frame 322, and the second frame 322 and the third frame 323 are both provided with accommodation gaps 5. In the folded state of the shielding piece 3, part of the fireproof cloth 31 is arranged in the accommodation gaps 5.

[0103] It can be understood that the accommodation gaps 5 can accommodate part of the fireproof cloth 31 in the folded state of the shielding piece 3, so as to form a regular and limited effect on the fireproof cloth 31 in the folded state, so as to ensure that the shielding piece 3 is more orderly in the folded state.

[0104] Referring to Figure 9 and Figure 11 , the first frame 321 is further provided with a limiting piece 7. When the first frame 321 is in the folded state, the limiting piece 7 is arranged on both sides of the first frame 321 in the first direction X and the side away from the connecting side 101. The purpose of the limiting piece 7 is to form a certain constraint and limitation on the fireproof cloth 31 when the skeleton 32 is folded.

[0105] Specifically, each limiting piece 7 includes a transition plate 72 and a limiting plate 71 connected to each other. The transition plate 72 is protruded on the side of the first frame 321 away from the pressure relief port 100, and the limiting plate 71 is connected to the side of the transition plate 72 away from the first frame 321. The limiting plate 71 on each limiting piece 7 extends towards the direction away from the pressure relief plate 2. When the shielding piece 3 is in the folded state, the limiting plate 71 is located on the side of the fireproof cloth 31 away from the box body 1. When the shielding piece 3 changes from the unfolded state to the folded state, the limiting plate 71 can constrain and limit the fireproof cloth 31, which is beneficial to the folding of the flange in the folding process.

[0106] It should be noted that the structure of the limiting piece 7 at different positions on the first frame 321 is different in this embodiment. For example, on the side of the first frame 321 away from the connecting side 101, the transition plate 72 and the limiting plate 71 of the limiting piece 7 on this side are integrally connected. On both sides of the first frame 321 in the first direction X, the transition plate 72 and the limiting plate 71 of the limiting piece 7 on the two sides are bolted. Moreover, the first frame 321 and the pressure relief plate 2 are also bolted. Specifically, the transition plate 72 on both sides of the first frame 321 in the first direction X is bent and extended towards the first frame 321, so as to bolt the transition plate 72 and the side of the pressure relief plate 2 away from the pressure relief port 100.

[0107] The above merely describes some embodiments of the present application, and does not limit the present application in any form. The protection scope of the present application is not limited to this, and any person skilled in the art can easily think of simple modifications, equivalent changes and modifications within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An electrical cabinet, characterized in that The utility model relates to a box (1) with a containing cavity (10) and a pressure relief port (100) in communication with the containing cavity (10), a pressure relief plate (2) reversibly arranged at the pressure relief port (100) and having a closed position and an open position, in the closed position, the pressure relief plate (2) covers the pressure relief port (100) to close the pressure relief port (100), in the open position, an opening (20) is formed between the pressure relief plate (2) and the pressure relief port (100), and a shielding piece (3) connected at one end to the box (1) and at the other end to the pressure relief plate (2), the shielding piece (3) being foldable to correspondingly form an unfolded state and a folded state when the pressure relief plate (2) is closed and opened. The shielding piece (3) includes a fireproof cloth (31). The box (1) has a mounting surface (1000) on which the pressure relief port (100) is arranged, the mounting surface (1000) having opposite first and second edge lines (1001) and (1002), the pressure relief port (100) being arranged closer to the second edge line (1002) than to the first edge line (1001), the pressure relief port (100) having a separation side (102) close to the second edge line (1002) and a connection side (101) away from the second edge line (1002), and the pressure relief plate (2) being reversibly arranged at the connection side (101). The fireproof cloth (31) includes a first part (311) connected at one end to the separation side (102) and at the other end to the pressure relief plate (2), the first part (311) being provided with a through opening (310) having a spacing from the mounting surface (1000) when the pressure relief plate (2) is in the open position. The pressure relief port (100) further has a transition side (103) connected between the same end of the separation side (102) and the connection side (101), and the fireproof cloth (31) includes a second part (312) connected at one end to the pressure relief plate (2) and at the other end to the transition side (103).

2. The electrical cabinet of claim 1, wherein, The shielding piece (3) further includes a framework (32) connected at one end to the box (1) and at the other end to the pressure relief plate (2), the framework (32) being foldable to correspondingly form the unfolded state and the folded state when the pressure relief plate (2) is closed and opened, and the fireproof cloth (31) being connected between any two or all of the framework (32), the pressure relief plate (2), and the pressure relief port (100).

3. The electrical cabinet of claim 2, wherein, ​ 4. The electrical cabinet of claim 3, wherein, ​ 5. The electrical cabinet of claim 3 or 4, wherein, ​ 6. The electrical cabinet of claim 3, wherein, ​ 7. The electrical cabinet of claim 6, wherein, The skeleton (32) comprises a first frame (321), a second frame (322) and a third frame (323) arranged outside the pressure relief port (100) from inside to outside, the first frame (321) and the second frame (322) are both rotationally arranged on the connecting side (101), and the rotation axes of the first frame (321) and the second frame (322) are coaxial with the rotation axis of the pressure relief plate (2), and the third frame (323) is fixedly connected to the box (1). The first frame (321) is fixedly connected to the pressure relief plate (2), and the skeleton (32) further comprises a linkage assembly (324) arranged between the first frame (321) and the second frame (322) to drive the second frame (322) to flip when the first frame (321) flips.

8. The electrical cabinet of claim 7, wherein, The linkage assembly (324) comprises: A first linkage (3241) is hingedly arranged on one side of the first frame (321) close to the connecting side (101); A second linkage (3242) is hingedly arranged on one side of the third frame (323) close to the connecting side (101); and An adjusting protrusion (3243) is arranged on the second linkage (3242); The other ends of the first linkage (3241) and the second linkage (3242) are hingedly arranged, the second frame (322) is provided with an adjusting groove (3220) extending along a direction perpendicular to the rotation axis of the pressure relief plate (2), and the adjusting protrusion (3243) is slidingly fitted in the adjusting groove (3220).

9. The electrical cabinet of claim 7, wherein, The fireproof cloth (31) comprises a first part (311), one end of the first part (311) is connected to the second frame (322), and the other end of the first part (311) is connected to the separation side (102).

10. The electrical cabinet of claim 9, wherein, The pressure relief port (100) further has a transition side (103) connected between the same end of the separation side (102) and the connecting side (101), the fireproof cloth (31) comprises a second part (312), one end of the second part (312) is connected to the transition side (103), and the other end of the second part (312) is connected to the pressure relief plate (2).

11. The electrical cabinet of claim 7, wherein, The first frame (321) and the second frame (322) are both provided with an accommodation gap (5), and in the folded state of the shielding piece (3), the fireproof cloth (31) is partially arranged in the accommodation gap (5).

12. The electrical cabinet of claim 7, wherein, The first frame (321) is provided with a limiting piece (7), the limiting piece (7) comprises a limiting plate (71), the limiting plate (71) is arranged on the side of the first frame (321) away from the box (1), and the limiting plate (71) extends away from the pressure relief plate (2), in the folded state of the shielding piece (3), the limiting plate (71) is located on the side of the fireproof cloth (31) away from the box (1).

13. The electrical cabinet of claim 12, wherein, The limiting piece (7) further comprises a transition plate (72) connected with the limiting plate (71), the transition plate (72) is protruded on the side of the first frame (321) away from the box body (1), and the limiting plate (71) is connected on the side of the transition plate (72) away from the first frame (321).

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