Explosion-proof box

Abstract

The utility model discloses an explosion-proof box. The explosion-proof box comprises a box body and a buffer fastening device, the box body comprises a box body and a box cover for covering and sealing an opening in one side of the box body; the buffering fastening device comprises a buffering hanging lug and a fixing piece matched with the buffering hanging lug. When one of the buffering hanging lug and the fixing piece is arranged on the box cover, the other one of the buffering hanging lug and the fixing piece is arranged on the box body. One or more hanging lug transverse partitions are arranged on the buffering hanging lug at intervals, so that the buffering hanging lug moves relative to the fixing piece under the explosion condition, and the buffering hanging lug is burst open or deformed by the fixing piece. The explosion-proof box has the advantages that kinetic energy generated by the box cover after explosion is effectively absorbed and resisted through the arrangement of the buffer hanging lugs, the box cover is prevented from flying out, the explosion-proof function is finally achieved, and the use safety of the explosion-proof box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof safety devices, in particular to an explosion-proof box. Background Art

[0002] In order to improve the safety of equipment use, electrical equipment usually needs to have explosion-proof function. Explosion-proof equipment can be divided into two types, internal explosion-proof type and external explosion-proof type. External explosion-proof equipment generally uses a hard alloy shell to prevent the impact of external explosions on the instruments inside the device. Internal explosion-proof equipment prevents the impact of internal explosions on surrounding objects.

[0003] The basic principle of explosion-proof devices is energy absorption and pressure relief. Pressure relief means that when the internal pressure of the box increases sharply, a high-pressure gas release channel or storage space is formed through the deformation of the shell, the breaking of local weak points, the operation of the internal mechanical structure, etc. The explosion-proof device mainly uses the weak points of the shell to break in advance to form a gas release channel. However, for more severe explosion conditions, the broken film or slot material may form high-speed fragments, which are more harmful to surrounding objects.

[0004] For example, in photovoltaic inverters, wind power converters, energy storage devices, battery systems and other equipment, when various faults cause the failure of internal power semiconductor devices, damage of energy storage components or the generation of abnormal flammable gases, violent physical or chemical explosions may occur. In particular, when the capacitor components in the converter suddenly over-voltage, over-temperature or short-circuit release electrolyte, carbon monoxide or hydrogen and other flammable gases, the explosion is powerful and may cause serious casualties.

[0005] When the box implodes violently, if the outer shell has weak deformation ability, the deformation slows down, or the physical strength of the fixing point between the outer shell and the box is insufficient, the outer shell may fly out quickly, resulting in lower safety of the explosion-proof box. Utility Model Content

[0006] The technical problem to be solved by the utility model is how to improve the use safety of the explosion-proof box.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] An explosion-proof box comprises a box body and a buffer fastening device;

[0009] The box body comprises a box body and a box cover for covering an opening on one side of the box body;

[0010] The buffer fastening device includes a buffer hanging ear and a fixing member matched with the buffer hanging ear; when one of the buffer hanging ear and the fixing member is arranged on the box cover, the other of the buffer hanging ear and the fixing member is arranged on the box body;

[0011] The buffer hanging ears are provided with one or more hanging ear transverse partitions at intervals, so that the buffer hanging ears move relative to the fixing member in the event of an explosion, causing the buffer hanging ears to be opened or deformed by the fixing member.

[0012] The buffer lugs are set to effectively absorb the kinetic energy generated by the box cover after the explosion, preventing the box cover from flying out, and ultimately achieving the explosion-proof function and improving the safety of the explosion-proof box.

[0013] Preferably, the side wall of the box body is a double-wall structure, a cavity is arranged inside the double-wall structure, and the buffer hanging ear is arranged in the cavity.

[0014] Preferably, the buffer fastening device is provided at least on one side of the box body.

[0015] Preferably, the buffer fastening device is arranged on one side of the box body, and the number of fasteners on the side of the box body where the buffer fastening device is arranged is less than the number of fasteners on the side of the box body opposite to the buffer fastening device, wherein the fasteners are used to fix the box cover on the box body;

[0016] Alternatively, the buffer fastening device is arranged on one side of the box body, and a fastener is arranged on the side of the box body adjacent to the side to limit part of the box cover from separating from the box body during explosion.

[0017] Preferably, the buffering and fastening devices are arranged at least on two sides of the box body, and the number of the buffering and fastening devices on each side is different or the same.

[0018] Preferably, the buffer hanging ear is a rigid structure or a flexible structure, and the end of the fixing piece away from the box body has an enlarged structure, and the diameter of the enlarged structure is greater than the width of the inner hole of the buffer hanging ear.

[0019] Preferably, the shape of the ear partition is a straight line shape, a V-shape, an arc shape, or a combination of at least two of them.

[0020] Preferably, along the direction from the box cover toward the fixing member, the spacing between two adjacent hanging ear partitions is equal, gradually decreases, gradually increases, or is arbitrarily set.

[0021] Preferably, the ear-hanging partition is a closed structure or a semi-closed structure.

[0022] Preferably, the buffer hanging ears are in the form of a strip frame structure, the strip frame structure is provided with through holes, and the hanging ear partitions are arranged on the through holes at intervals in the horizontal direction.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] 1. By setting the buffer hanging ears, the kinetic energy generated by the box cover after the explosion is effectively absorbed, and the box cover is prevented from flying out, finally realizing the explosion-proof function and improving the safety of the explosion-proof box.

[0025] 2. The box cover is tightly connected to the box body, and the fasteners are located on the surface of the box cover, which does not affect the protection capability of the explosion-proof box while achieving the explosion-proof function.

[0026] 3. The position and quantity of buffer hanging ears can be adjusted as needed to meet different explosion-proof requirements.

[0027] 4. The overall solution of the explosion-proof box is simple and reliable, and different explosion-proof solutions can be designed for different explosion-proof requirements, with strong applicability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the first embodiment of the utility model after explosion;

[0030] Figure 3 This is a front view of the first embodiment of the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of a buffer hanging ear in Embodiment 1 of the present utility model;

[0032] Figure 5 This is another structural schematic diagram of the buffer hanging ear of the first embodiment of the utility model;

[0033] Figure 6 This is another structural schematic diagram of the buffer hanging ear of the first embodiment of the utility model;

[0034] Figure 7 This is another structural schematic diagram of the buffer hanging ear of the first embodiment of the utility model;

[0035] Figure 8 This is a schematic diagram of the structure of the fourth embodiment of the present utility model;

[0036] Fig. 9 This is a schematic diagram of the structure of the fourth embodiment of the utility model after explosion;

[0037] Fig.10 This is a schematic diagram of the structure of Embodiment 5 of the present utility model;

[0038] Fig.11 It is a cross-sectional view of the fifth embodiment of the utility model;

[0039] Fig.12 This is a schematic diagram of the structure of the sixth embodiment of the utility model;

[0040] Fig.13 It is a cross-sectional view of the sixth embodiment of the present utility model. DETAILED DESCRIPTION

[0041] In order to facilitate those skilled in the art to understand the technical solution of the utility model, the technical solution of the utility model is further explained in conjunction with the drawings in the specification.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically limited.

[0044] Embodiment 1

[0045] See also Figures 1 to 3 , this embodiment discloses an explosion-proof box, comprising a box body 1 and a buffer fastening device 2;

[0046] The box body 1 includes a box body 11, a box cover 12 that blocks an opening on one side of the box body 11, and a fastener 13 that locks the box body 11 and the cover plate 12; in the present embodiment, the fastener 13 includes a fastening nut 131 and a fastening screw 132, the fastening nut 131 is vertically fixed to the top of the box body 11, the fastening screw 132 passes through the box cover 12 and is threadedly connected to the fastening nut 131, so as to achieve locking of the box body 11 and the cover plate 12; of course, the fastener 13 can also use an adhesive to fix the box body 11 and the cover plate 12, such as gluing.

[0047] The box body 11 and the box cover 12 are made of hard materials such as aluminum alloy, carbon steel, stainless steel, etc. The box body 11 can have a polygonal opening shape such as a rectangular opening shape and a square opening shape. In the present embodiment, the box body 11 has a rectangular opening shape.

[0048] Furthermore, the box cover 12 and the box body 11 may be in a fully sealed state or in a partially sealed state.

[0049] The buffer fastening device 2 includes a buffer hanging ear 21 and a fixing member 22 for hanging the buffer hanging ear 21. When the buffer hanging ear 21 is set on the box cover 12, the fixing member 22 is set on the box body 11. When the buffer hanging ear 21 is set on the box body 11, the fixing member 22 is set on the box cover 12. In this embodiment, the buffer hanging ear 21 is set on the box cover 12, and the fixing member 22 is set on the box body 111. In this embodiment, the buffer fastening device 2 is set on one side of the box body 1, or on two corresponding sides, or on two sides that intersect with each other, or on three sides, or in an omnidirectional setting. For example, the number of buffer fastening devices 2 on both sides can be the same or different. In addition, on the same side of the box body 1, only the buffer fastening device 2 can be set, or only the fastener 13 can be set, or the two can be mixed.

[0050] When an explosion occurs in the box body 1 or the pressure is too high, the box cover 12 breaks through the fixing of the fixing piece 22 under pressure and separates from the box body 11. During the separation process, the buffer ear 21 moves relative to the buffer fastening device 2 under the action of the box cover 12. When it moves to the end of the buffer ear 21, the buffer ear 21 hooks the buffer fastening device 2 and no longer moves, thereby achieving the buffering and box cover anti-detachment effect.

[0051] Furthermore, when the box body 1 does not have fasteners 13 on the side where the buffer fastening device 2 is set, or the number of fasteners 13 is small, resulting in different fastening forces on different sides of the box body 1, the side with smaller fastening force will be punched open. When the box body 1 has only one or more fasteners 13 in the middle of two sides where no buffer fastening device 2 is set, and buffer fastening devices 2 are set on two side sides perpendicular to the sides where the fasteners 13 are set, after the buffer fastening device 2 is punched open, the box cover 12 may be punched into a V-shaped structure with its mouth facing outward.

[0052] Furthermore, the buffer hanging ear 21 is a strip frame structure composed of left and right frames parallel to each other. The top ends of the left and right frames are fixed to the box cover 21. One or more hanging ear partitions 211 are arranged between the two frames to connect the two frames. In general, Figure 3 or Figure 4The lowermost hanging ear partition 211 is in an arc shape, and the hanging ear partition 211 can divide the through-hole space between the left and right frames into a plurality of sub-holes arranged in a sequence. The fixing member 22 passes through the through hole and is arranged in the sub-hole near the box cover 12; in this embodiment, the fixing member 22 includes a fixing nut (not shown) and a fixing screw 221, the fixing nut is horizontally fixed to the inner wall of the side wall of the box body 11, the fixing screw 221 passes through the side wall of the box body 11 and is connected to the fixing nut, the buffer hanging ear 21 is hung on the fixing screw 221, and the fixing screw 221 is hung on the hanging ear partition 211 near the box cover 12, the nut diameter of the fixing screw 221 at the end away from the box body 1 is larger than the inner width of the through hole, so as to prevent the nut on the fixing screw 221 from detaching from the buffer hanging ear 21, and at the same time, the nut on the fixing screw 221 can also be used to press the buffer hanging ear 21 to fix the buffer hanging ear 21, so as to further improve the sealing and fixing effect between the box body 11 and the box cover 12. Of course, the structural strength of the hanging ear partition 211 is less than the structural strength of the left and right frames, so as to prevent the left and right frames from breaking before the hanging ear partition 211 is pulled off.

[0053] It should be noted that, in this embodiment, only the buffer lug 21 can be used to fix the box body 11 and the cover plate 12; specifically, the sub-hole between the lug partition 211 closest to the box cover 21 and the box cover 12 is used to accommodate the passage of the fixing screw 221, and the fixing screw 221 fixes the box body 11 and the cover plate 12; of course, the buffer lug 21 and the fastener 13 can also be used in conjunction with each other. In this case, the buffer fastening device 2 can achieve the effect of buffering and preventing the box cover from falling off during sealing and explosion, and the fastener 13 is used to fix the box cover 12 on the box body 11 to achieve the fixing or sealing effect. In actual applications, the sub-hole between the lug partition 211 closest to the box cover 21 and the box cover 12 can be a strip hole, in which case the sub-hole is only for the passage of the fixing screw 221 and is not used to fix the box cover 12.

[0054] For details, see Figure 4 Before the explosion, the buffer ear 21 on the box cover 12 is loosely connected to the fixing part 22 on the box body 11. When the box body 11 explodes and the box body 11 remains in position, the explosion inside the box body 11 generates a large expansion force, causing one side of the box cover 12 to separate from the box body 11. After the explosion, the buffer ear 21 on the box cover 12 separates from the box body 11. At this time, the ear diaphragm 211 hits the fixing screw 221 and breaks, which plays an energy absorption and buffering role. If there are multiple ear diaphragms 211, multiple of them break in sequence to form a step-by-step energy absorption effect. At the same time, an opening appears between the box cover 12 and the box body 11 to form a pressure relief channel. It should be noted that Figure 4The arc-shaped frame at the bottom of the middle buffer hanging ear 21 can play an energy-absorbing role together with the hanging ear cross partition 211. After the explosion, the arc-shaped frame at the bottom of the buffer hanging ear 21 is still hung on the fixing part 22 to prevent the box cover 12 from flying out. Through the setting of the buffer hanging ear 21, the kinetic energy generated by the box cover 12 after the explosion is effectively absorbed and resisted, and the box cover 12 is prevented from flying out, thereby finally realizing the explosion-proof function and improving the safety of the explosion-proof box.

[0055] Further, such as Figure 1 As shown, the buffer hanging ear 21 is a rigid waist-shaped structure with an internal opening. In practical applications, the buffer hanging ear 21 can also be a flexible structure, for example, a plurality of H-shaped rigid structures that are movably connected to each other, the two lower end points of the previous H-shaped rigid structure are movably connected to the two upper end points of the next H-shaped rigid structure, and the two sides of the H-shaped structure play a guiding and limiting role to prevent the buffer fastening device 2 from being separated from the buffer hanging ear 21. The transverse connection structure in each H-shaped structure is used as a hanging ear partition 211. Of course, the strength of the hanging ear partition 211 is lower than the strength of the movably connected structure between the H-shaped rigid structures, so as to prevent the H-shaped rigid structures from being torn apart.

[0056] The buffer ear 21 can be a flexible structure or a rigid structure. When the buffer ear 21 can be a flexible structure, the end of the fixing member 22 away from the box body 1 has an enlarged structure, and the diameter of the enlarged structure is larger than the width of the groove body in the buffer ear 21 for accommodating the relative movement of the fixing member 22, for example, larger than the distance between the two side edges of the H-shaped structure, or the distance between the left and right frames in the strip frame structure, thereby preventing the buffer ear 21 from falling off the fixing member 22.

[0057] In this embodiment, the structure is rigid, and its material is hard material such as aluminum alloy, carbon steel, stainless steel, etc. The buffer hanging ear 21 can be integrally formed with the box cover 12. Specifically, when the buffer hanging ear 21 is a rigid structure, the end of the fixing member 22 away from the box body 1 can also have an expanded structure.

[0058] Furthermore, the buffer lugs 21 can be arranged horizontally with the box cover 12 and radiate outward, or folded, and then the buffer lugs 21 are cut off in sequence after being straightened, or the buffer lugs 21 can be arranged parallel to the lateral extension direction of the box cover 12 ( Figure 4 The fixing screw 221 is arranged perpendicular to the extension direction of the box cover 12. When the box cover 12 is horizontally ( Figure 4 When the buffer lug 21 moves in the horizontal direction (shown in the figure), the lug partition 211 in the buffer lug 21 is pulled off to achieve lateral explosion-proof and to push the box cover 12 out laterally. In this embodiment, the buffer lug 21 is arranged vertically downwardly from the box cover 12.

[0059] Furthermore, the number and arrangement position of the buffer lugs 21 are determined according to the size of the box body 11 and the requirements of the explosion-proof box. The number of buffer lugs 21 may be consistent with or inconsistent with the number of fasteners 13. The arrangement pattern of the fasteners 13 and / or the buffer lugs 21 may be arranged in a certain direction with increasing or decreasing spacing in sequence; see Figure 3 as well as Figures 5 to 7 , the ear diaphragm 211 is a complete one-line structure, isolating the buffer ear 21 into a number of closed through holes. In practical applications, the ear diaphragm 211 can be V-shaped, inverted V-shaped, arc-shaped, etc., or a combination of any two or more of the above shapes. In practical applications, the ear diaphragm 211 can also be a two-section structure, with the left section fixed on the left frame and the right section fixed on the right frame, with a gap between the two, which is smaller than the outer diameter of the fixing screw 221. In this embodiment, the extension direction of the ear diaphragm 211 can be horizontal or inclined, which is set according to actual needs. And the number and the interval between them can also be set according to actual needs. In this embodiment, the ear diaphragm 211 is a rectangular structure, the long side of the rectangle is roughly consistent with the direction of movement of the buffer ear 21 relative to the fixing member during explosion, and the ear diaphragm 211 of the closed structure extends from the long side of the rectangle to the other long side.

[0060] Furthermore, along the direction from the box cover 12 toward the fixing member 11, the spacing between two adjacent hanging ear partitions 211 is equal, gradually decreases, gradually increases, or is set arbitrarily. By setting different spacings, different energy absorption is generated for the box cover 12 to meet the explosion-proof requirements.

[0061] Embodiment 2

[0062] The difference between this embodiment and the first embodiment is that in this embodiment, the buffer fastening devices 2 are arranged on the corresponding two sides of the box body 1, and the number of buffer fastening devices 2 on the two sides is different, so that during the explosion, the side with fewer buffer fastening devices 2 will be opened first or not opened; when the explosion intensity is large enough, the side with more buffer fastening devices 2 will be opened later than the side with fewer buffer fastening devices.

[0063] Embodiment 3

[0064] The difference between this embodiment and the first embodiment is that in this embodiment, the buffer fastening device 2 is arranged on two adjacent sides of the box body 1. When the number of buffer fastening devices 2 on both sides is the same, both sides of the box body 1 where the buffer fastening devices 2 are arranged can be hung on the fixing parts 22 after the explosion, thereby achieving the buffering and anti-dropping effects of the box cover.

[0065] When the number of buffer fastening devices 2 on both sides is different, the side with fewer buffer fastening devices 2 will be opened first or not opened at all during an explosion; when the explosion intensity is large enough, the side with more buffer fastening devices 2 will be opened later than the side with fewer buffer fastening devices.

[0066] Furthermore, when the box body 1 does not have a fastener 13 on the side where the buffer fastening device 2 is set, both sides will be punched open. When the box body 1 has a fastener 13 in the middle of each of the two sides where the buffer fastening device 2 is not set, the box cover 12 may be punched into a structure with an opening facing outward, causing the box body 12 to present a triangular opening.

[0067] Embodiment 4

[0068] See also Figure 8 On the basis of the first embodiment, the buffer hanging ear 21 is arranged on one side of the box body 11 , and the other side surfaces of the box body 11 are not provided with the buffer hanging ear 21 .

[0069] Specifically, due to the setting of the buffer ear 21, the sealing and fixing strength of this side of the box body 1 is guaranteed, so that the number of fasteners 13 on the side of the box body 1 where the buffer ear 21 is set can be less than the number of fasteners 13 on the side of the box body 1 opposite to the buffer ear 21, thereby reducing manufacturing costs.

[0070] For details, see Fig. 9 When an explosion occurs inside the box body 11, the box cover 12 and the box body 11 at the position of the lower fastener 13 do not move, while the upper fastener 13 is damaged, causing the upper box cover 12 to expand, and then the ear diaphragm 211 of the buffer ear 21 is damaged by the expansion, and at the same time, a pressure relief hole appears between the box cover 12 and the box body 11. Due to the arrangement of the lower fastener 13 and the buffer ear 21 on the upper part of the box cover 12, the kinetic energy generated by the box cover 12 after the explosion can be effectively absorbed and the box cover 12 is prevented from flying out, and finally the explosion-proof function is realized, and the safety of the explosion-proof box is improved.

[0071] Embodiment 5

[0072] See also Fig.10 and Fig.11 The difference between this embodiment and the first embodiment is that the side wall of the box body 11 is a double-wall structure, a cavity 111 is arranged inside the double-wall structure, and the end of the buffer ear 21 away from the box cover 12 is arranged in the cavity 111; specifically, the fixing nut is horizontally fixed to the inner wall of the double-wall structure, the fixing screw 221 passes through the double-wall structure and is connected with the fixing nut, and the end of the buffer ear 21 away from the box cover 12 is arranged in the cavity 111 and hung on the fixing screw 221 in the cavity 111.

[0073] The top of the inner side wall of the double-wall structure is a bent portion bent toward the center of the box body 11, and the fastening nut 131 is vertically fixed on the bent portion.

[0074] In this embodiment, the side wall of the box body 11 is set to a double-wall structure, so that the buffer hanging ear 21 is arranged inside the box body 11 and is not exposed outside the box body 1, thereby simplifying the overall appearance of the explosion-proof box.

[0075] Embodiment 6

[0076] See also Fig.12 and Fig.13 The difference between this embodiment and the first embodiment is that the buffer hanging ear 21 is formed separately from the box cover 12. In this embodiment, the buffer hanging ear 21 is fixed on the fastening nut 131 accordingly.

[0077] Specifically, the buffer ear 21 is arranged inside the box body 11. When an explosion occurs inside the box body 11, the fastening nut 131 is separated from the box body 11, and the buffer ear 21 and the fastening nut 131 move synchronously. The ear diaphragm 211 on the buffer ear 21 is destroyed, and at the same time, a pressure relief hole appears between the box cover 12 and the box body 11. Similarly, through the setting of the buffer ear 21, the kinetic energy generated by the box cover 12 after the explosion is effectively absorbed and resisted, and the box cover 12 is prevented from flying out, thereby finally realizing the explosion-proof function and improving the safety of the explosion-proof box.

[0078] Furthermore, in this embodiment, the number of the hanging ear partition 211 is one.

[0079] Furthermore, the ear partition 211 is an arc-shaped semi-closed structure. Specifically, the ear partition 211 is composed of two groups of arc structures. The opposite ends of the two groups of arc structures are relatively arranged on the vertical inner wall of the through hole on the buffer ear 21, and a spacing is arranged between the opposite ends, so that the ear partition 211 is an arc-shaped semi-closed structure.

[0080] In summary, the explosion-proof box can not only realize the explosion-proof function and improve the safety of use of the explosion-proof box, but also has the following functions:

[0081] (1) The box cover 12 in this embodiment is tightly connected to the box body 11, and the fastener 13 is located on the surface of the box cover 12, which does not affect the protection capability of the explosion-proof box while achieving the explosion-proof function;

[0082] (2) The position and number of the buffer lugs 21 can be adjusted as needed to meet different explosion-proof requirements;

[0083] (3) The shape, size and spacing of the hanging ear partition 211 on the buffer hanging ear 21 can be adjusted as needed;

[0084] (4) The overall solution of the explosion-proof box is simple and reliable, and different explosion-proof solutions can be designed for different explosion-proof requirements, with strong applicability and practicality.

[0085] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0086] The above-described embodiments merely represent implementation methods of the utility model, and the protection scope of the utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, and all of these belong to the protection scope of the utility model.

Claims

1. An explosion-proof box, characterized in that: It includes a box body and a buffer fastening device; The box body comprises a box body and a box cover for covering an opening on one side of the box body; The buffer fastening device includes a buffer hanging ear and a fixing member matched with the buffer hanging ear; when one of the buffer hanging ear and the fixing member is arranged on the box cover, the other of the buffer hanging ear and the fixing member is arranged on the box body; The buffer hanging ears are provided with one or more hanging ear transverse partitions at intervals, so that the buffer hanging ears move relative to the fixing member in the event of an explosion, causing the buffer hanging ears to be opened or deformed by the fixing member.

2. An explosion-proof box according to claim 1, characterized in that: The side wall of the box body is a double-wall structure, a cavity is arranged inside the double-wall structure, and the buffer hanging ear is arranged in the cavity.

3. The explosion-proof box according to claim 1, characterized in that: The buffer fastening device is arranged at least on one side of the box body.

4. An explosion-proof box according to claim 3, characterized in that: The buffer fastening device is arranged on one side of the box body, and the number of fasteners on the side of the box body where the buffer fastening device is arranged is less than the number of fasteners on the side of the box body opposite to the buffer fastening device, wherein the fasteners are used to fix the box cover on the box body; Alternatively, the buffer fastening device is arranged on one side of the box body, and a fastener is arranged on the side of the box body adjacent to the side to limit part of the box cover from separating from the box body during explosion.

5. The explosion-proof box according to claim 3, characterized in that: The buffering and fastening devices are arranged at least on two sides of the box body, and the number of the buffering and fastening devices on each side is different or the same.

6. The explosion-proof box according to claim 1, characterized in that: The buffer hanging ear is a rigid structure or a flexible structure, and one end of the fixing piece away from the box body has an enlarged structure, and the diameter of the enlarged structure is greater than the width of the inner hole of the buffer hanging ear.

7. The explosion-proof box according to claim 1, characterized in that: The shape of the ear partition is one of a straight line shape, a V-shape, and an arc shape, or a combination of at least two of them.

8. An explosion-proof box according to any one of claims 1 to 7, characterized in that: Along the direction from the box cover toward the fixing member, the spacing between two adjacent hanging ear partitions is equal, gradually decreases, gradually increases, or is set arbitrarily.

9. An explosion-proof box according to claim 8, characterized in that: The ear-hanging diaphragm is a closed structure or a semi-closed structure.

10. An explosion-proof box according to claim 9, characterized in that: The buffer hanging ears are in the form of a strip frame structure, a through hole is arranged on the strip frame structure, and the hanging ear partitions are arranged on the through hole in a horizontal direction and at intervals.

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