Explosion-proof device and explosion-proof box

Abstract

The utility model discloses an explosion-proof device and an explosion-proof box. The explosion-proof device comprises a limiting mechanism, an explosion-proof mechanism and a first fastener, the limiting mechanism is located outside the box body and fixedly connected with the box body, and a first space is formed between the limiting mechanism and the box body; the anti-explosion mechanism is located in the first space, and a gap exists between the anti-explosion mechanism and the limiting mechanism. The first fastener penetrates through the box cover and the limiting mechanism and is connected with the anti-explosion mechanism, and the anti-explosion mechanism can deform when the box cover is subjected to preset impact force. The explosion-proof box comprises an explosion-proof device. Through the arrangement, the explosion-proof performance of the box body and the box cover can be improved, so that the situation that the box cover is blown away is avoided, and the use safety of the box cover and the box body is improved.

Description

Technical Field

[0001] The present application relates to the field of electrical equipment, and in particular to an explosion-proof device and an explosion-proof box. Background Art

[0002] Electrical explosion proof enclosures are devices used to control and protect electrical systems, often in industrial, commercial, and residential settings. Explosion proof enclosures are usually made of metal to protect the electrical components inside from external damage.

[0003] In the prior art, an explosion-proof box is usually composed of a box body and a box cover. The box body contains electrical components, such as inverters or converters. When the electrical equipment is in use, the electrical components in the box body will be overloaded due to high temperature. As the temperature of the electrical components gradually rises, the electrical components will eventually explode. However, the explosion-proof performance of the explosion-proof box in the prior art is poor, resulting in the box cover being blown off when the explosion-proof box is subjected to the high-voltage impact of the explosion, thereby threatening the life safety of the on-site staff. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the purpose of the present application is to provide an explosion-proof device and an explosion-proof box, which can improve the explosion-proof property and safety of the explosion-proof box.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] An explosion-proof device is used to connect a box body and a box cover, and the explosion-proof device includes a limiting mechanism, an explosion-proof mechanism and a first fastener. The limiting mechanism is located outside the box body and is fixedly connected to the box body, and a first space is formed between the limiting mechanism and the box body. The explosion-proof mechanism is located in the first space, and there is a gap between the explosion-proof mechanism and the limiting mechanism. The first fastener is inserted through the box cover and the limiting mechanism and connected to the explosion-proof mechanism, wherein the explosion-proof mechanism can be deformed when the box cover is subjected to a preset impact force.

[0007] Furthermore, the explosion-proof mechanism includes a concave portion, a first end, and a second end. There is a gap between the concave portion and the limiting mechanism, the first fastener is connected to the concave portion, and the concave portion can be deformed when the box cover is subjected to a preset impact force. The first end and the second end are respectively arranged at both ends of the concave portion.

[0008] Furthermore, the opening of the concave portion faces the box body, and the first end and the second end are respectively connected to the box body.

[0009] Furthermore, the explosion-proof device further includes a first fixing member and a second fixing member. The limiting mechanism further includes a third end and a fourth end. The first fixing member fixes and connects the first end of the explosion-proof mechanism, the third end of the limiting mechanism and the box body, and the second fixing member fixes and connects the second end of the explosion-proof mechanism, the fourth end of the limiting mechanism and the box body.

[0010] Furthermore, the opening of the concave portion faces the limiting mechanism, and the first end and the second end are respectively connected to the limiting mechanism.

[0011] Furthermore, the opening of the concave portion faces the limiting mechanism, and the first end and the second end are respectively in contact with the limiting mechanism.

[0012] Furthermore, the explosion-proof mechanism is a concave portion, the opening of the concave portion faces the limiting mechanism, and both ends of the concave portion abut against the limiting mechanism.

[0013] Furthermore, the structural strength of the limiting mechanism is greater than the structural strength of the concave portion.

[0014] Furthermore, the structural strength of the limiting mechanism is greater than the structural strength of the concave portion, including at least one of the following three methods: the concave portion is provided with at least one notch, the concave portion is provided with and / or at least one through hole, or the material structural strength of the limiting mechanism is greater than the material structural strength of the concave portion.

[0015] Furthermore, the concave portion is provided with a second through hole for the first fastener to pass through, and a mounting nut is provided at the concave portion corresponding to the second through hole. The first fastener is passed through the second through hole and fixedly connected to the mounting nut, so that when the box cover is subjected to a preset impact force, the mounting nut applies a force toward the box cover to the concave portion.

[0016] Furthermore, an explosion-proof box includes a box body and a box cover, and the box body and the box cover are connected through an explosion-proof device.

[0017] In the present application, the deformable explosion-proof mechanism can make the first fastener move relative to the limiting mechanism, so that the box cover can move relative to the box body, thereby forming a pressure relief gap between the box cover and the box body. The pressure in the box body can be released from the pressure relief gap, which is beneficial to reduce the preset impact force on the box cover, and then avoid the box cover being blown off, which can improve the explosion-proofness and safety of the explosion-proof device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof device of this application;

[0019] Figure 2 This is a second structural schematic diagram of the explosion-proof device of the present application;

[0020] Figure 3 This is a schematic diagram of the third structure of the explosion-proof device of the present application;

[0021] Figure 4 This is a fourth structural schematic diagram of the explosion-proof device of the present application;

[0022] Figure 5 This is a fifth structural schematic diagram of the explosion-proof device of the present application;

[0023] Figure 6 A schematic diagram of the structure of the explosion-proof mechanism of the explosion-proof device of the present application;

[0024] Figure 7 A second structural schematic diagram of the explosion-proof mechanism of the explosion-proof device of the present application;

[0025] Figure 8 This is a schematic diagram of the structure of the limit mechanism of the explosion-proof device of the present application;

[0026] Fig. 9 This is a schematic diagram of the overall structure of the explosion-proof box of this application. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the specific implementation manner of the present application will be clearly and completely described below in conjunction with the drawings in the implementation manner of the present application.

[0028] It should be noted that the terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. "Multiple" or "several" means at least two. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0029] like Figure 1 As shown, an explosion-proof device 100 is used to connect a box body 21 and a box cover 22. Electrical components, such as inverters or converters, can be placed in the box body 21. The box cover 22 can protect the internal electrical components.

[0030] Specifically, the explosion-proof device 100 includes a limiting mechanism 11, an explosion-proof mechanism 12 and a first fastener 13. The limiting mechanism 11 is located outside the box body 21 and is fixedly connected to the box body 21. A first space is formed between the limiting mechanism 11 and the box body 21. The explosion-proof mechanism 12 is located in the first space, and there is a gap between the explosion-proof mechanism 12 and the limiting mechanism 11. The above gap can provide a deformation space for the deformation of the explosion-proof mechanism 12. The first fastener 13 is inserted through the box cover 22 and the limiting mechanism 11 and is connected to the explosion-proof mechanism 12, so that the box cover 22 is connected to the box body 21 through the connection between the first fastener 13 and the limiting mechanism 11, so that the box cover 22 plays a protective role on the electrical components inside the box body 21. The explosion-proof mechanism 12 can be deformed when the box cover 22 is subjected to a preset impact force.

[0031] Specifically, when the box cover 22 is subjected to a preset impact force, the box cover 22 applies a force away from the box body 21 to the explosion-proof mechanism 12 through the first fastener 13, so that the explosion-proof mechanism 12 can be deformed by the force, so that the first fastener 13 can move relative to the limiting mechanism 11 in a direction away from the box body 21, and then the box cover 22 can move relative to the box body 21, so that the box cover 22 and the box body 21 are separated and a pressure relief gap is generated. The pressure generated by the explosion in the box body 21 can be released from the pressure relief gap, which is conducive to reducing the impact force on the box cover 22, preventing the box cover 22 from being blown away, and thus improving the explosion-proofness and safety of the explosion-proof device 100. Furthermore, during the movement of the first fastener 13 relative to the limiting mechanism 11, the limiting mechanism 11 can limit the explosion-proof mechanism 12, thereby preventing the explosion-proof mechanism 12 from detaching from the first space, and further preventing the first fastener 13 from detaching from the limiting mechanism 11, so that when the box cover 22 moves relative to the box body 21, the box cover 22 will not detach from the box body 21.

[0032] In the embodiment of the present application, the preset impact force refers to the impact force generated when the electronic components in the box body 21 explode. The above impact force will cause the box cover 22 to move in a direction away from the box body 21.

[0033] like Figure 1 As shown, as an embodiment, the explosion-proof mechanism 12 includes a concave portion 121, a first end 122 and a second end 123. There is a gap between the concave portion 121 and the limiting mechanism 11, and the gap can provide space for the concave portion 121 to deform, so that when the concave portion 121 is deformed, there is a certain space to accommodate the deformation of the concave portion 121 relative to the limiting mechanism 11.

[0034] Specifically, the concave portion 121 can be deformed when the box cover 22 is subjected to a preset impact force, so that the first fastener 13 can be moved relative to the limiting mechanism 11 in a direction away from the box body 21 through the deformation of the concave portion 121, thereby enabling the box cover 22 to move relative to the box body 21 and cooperate with the box body 21 to form a pressure relief gap, which is beneficial to the pressure relief of the box body 21.

[0035] More specifically, the first fastener 13 is connected to the concave portion 121 , so that the box cover 22 can drive the concave portion 121 to deform through the first fastener 13 .

[0036] It can be understood that when the box cover 22 is subjected to a preset impact force, the connection between the first fastener 13, the box cover 22 and the concave portion 121 can enable the box cover 22 to apply a force away from the box body 21 to the concave portion 121 through the first fastener 13, so that the concave portion 121 is deformed, and the first fastener 13 is moved away from the box body 21 relative to the limiting mechanism 11 through the deformation of the concave portion 121, thereby causing the box cover 22 to move relative to the box body 21, so that a pressure relief gap can be formed between the box cover 22 and the box body 21 for pressure relief, thereby avoiding the box cover 22 being blown away by excessive impact force, which is beneficial to improving the explosion-proof performance of the box cover 22.

[0037] It should be noted that the concave portion 121 is a structure having a groove, which can be Figure 1 The U-shape shown may also be an arc shape, a trapezoidal shape, etc.

[0038] Optionally, the first end 122 and the second end 123 are respectively disposed at both ends of the concave portion 121. The first end 122 and the second end 123 facilitate the connection of the concave portion 121 with the box body 21 or the limiting mechanism 11, thereby facilitating the fixing of the concave portion 121 in the explosion-proof device 100.

[0039] like Figure 1 As shown, as an embodiment, the opening of the concave portion 121 faces the box body 21, and the first end 122 and the second end 123 are respectively connected to the box body 21. When the box cover 22 is subjected to a preset impact force, the box cover 22 drives the concave portion 121 to deform through the first fastener 13, so that the first fastener 13 moves relative to the limiting mechanism 11 in a direction away from the box body 21, thereby forming a pressure relief gap between the box cover 22 and the box body 21 for pressure relief.

[0040] It can be understood that in order to enable the first fastener 13 to move a larger distance relative to the limiting mechanism 11, the connection stability between the first end 122 and the second end 123 and the box body 2 is less than the connection stability between the limiting mechanism 11 and the box body 21, so that when the box cover 22 is subjected to an excessively large preset impact force, the limiting mechanism 11 and the box body 21 are still in a connected state, while the first end 122 and the second end 123 can fall off from the box body 21, so that the first fastener 13 can move a larger distance relative to the limiting mechanism 11, thereby making the pressure relief gap between the box cover 22 and the box body 21 larger, which is beneficial to improving the pressure relief effect of the pressure relief gap.

[0041] Figure 2 As shown, as another embodiment, the explosion-proof device 100 further includes a first fixing member 14 and a second fixing member 15, and the limiting mechanism 11 further includes a third end 111 and a fourth end 112. The first fixing member 14 fixes and connects the first end 122 of the explosion-proof mechanism 12, the third end 111 of the limiting mechanism 11, and the box body 21, and the second fixing member 15 fixes and connects the second end 123 of the explosion-proof mechanism 12, the fourth end 112 of the limiting mechanism 11, and the box body 21. In some embodiments, the first fixing member 14 and the second fixing member 15 are bolts, and the first end 122 of the concave portion 121 and the third end 111 of the limiting mechanism 11 are fixed to the box body 21 by bolts, and the second end 123 of the concave portion 121 and the fourth end 112 of the limiting mechanism 11 are also fixed to the box body 21 by bolts, so that the limiting mechanism 11 and the concave portion 121 can be fixed to the box body 21 by a set of bolts, which is conducive to simplifying the structure of the explosion-proof device 100 and reducing the assembly cost of the explosion-proof device 100.

[0042] As another optional implementation, the explosion-proof mechanism 12 and the limiting mechanism 11 are fixed to the box body by different fixing members. Figure 1 As shown, the explosion-proof device 100 further includes a third fixing member 16 and a fourth fixing member 17, and the third fixing member 16 and the fourth fixing member 17 respectively fix the two ends of the limiting mechanism 11 to the box body 21. The first fixing member 14 fixes the first end 122 of the explosion-proof mechanism 12 to the box body 21, and the second fixing member 15 fixes the second end 123 of the explosion-proof mechanism 12 to the box body 21. In some embodiments, the first fixing member 14, the second fixing member 15, the third fixing member 16 and the fourth fixing member 17 can all be bolts.

[0043] like Figure 3 As shown, as another embodiment, the opening of the concave portion 121 faces the limiting mechanism 11. By facing the opening of the concave portion 121 toward the limiting mechanism 11, a gap is formed between the limiting mechanism 11 and the concave portion 121, thereby providing a deformation space for the concave portion 121.

[0044] Specifically, the first end 122 and the second end 123 are respectively connected to the limiting mechanism 11. In some embodiments, the first end 122 and the second end 123 are respectively connected to the limiting mechanism 11 by screws, so as to limit the position of the concave portion 121 relative to the limiting mechanism 11, and then during the deformation of the concave portion 121, the concave portion 121 will not be offset, which is conducive to the deformation of the concave portion 121.

[0045] like Figure 4 As shown, in some embodiments, the first end 122 and the second end 123 are respectively in contact with the limiting mechanism 11. In this embodiment, it is not necessary to connect the explosion-proof mechanism and the limiting mechanism by bolts, but by adjusting the relative position of the first fastener 13 and the explosion-proof mechanism 12, the first end 122 and the second end 123 are respectively in contact with the limiting mechanism 11. For example: the first fastener 13 is a bolt, and a hole is provided on the concave portion 121. The first fastener 13 passes through the hole on the concave portion 121 to connect with a nut. By adjusting the position of the nut on the first fastener 13, the first end 122 and the second end 123 are respectively in contact with the limiting mechanism 11.

[0046] Optionally, a thread is provided on the hole wall of the concave portion 121, and the first fastener 13 is connected to the explosion-proof mechanism via the thread. By adjusting the position of the explosion-proof mechanism on the first fastener, the first end 122 and the second end 123 are respectively abutted against the limiting mechanism 11.

[0047] Through the above arrangement, the first end 122 and the second end 123 abut against the limiting mechanism 11 so that the limiting mechanism 11 can support the concave portion 121 so that the concave portion 121 can be deformed when subjected to the force of the first fastener 13 .

[0048] It can be understood that when the box cover 22 is subjected to a preset impact force, the first fastener 13 applies a force to the concave portion 121 away from the box body 21. At this time, the first end 122 and the second end 123 support the concave portion 121, so that the concave portion 121 can be deformed when subjected to the force of the first fastener 13, so that the first fastener 13 can move relative to the limiting mechanism 11 in a direction away from the box body 21, and then the box cover 22 can move relative to the box body 21 and form a pressure relief gap for pressure relief. In addition, the structure of the explosion-proof mechanism 12 can be simplified by the way that the first end 122 and the second end 123 abut against the limiting mechanism 11, which is conducive to the assembly of the explosion-proof mechanism 12.

[0049] It should be noted that the connection method in which the first end 122 and the second end 123 are connected to the limiting mechanism 11 by bolts and the connection method in which the first end 122 and the second end 123 are abutted against the limiting mechanism 11 are both a connection method between the first end 122 and the second end 123 and the limiting mechanism 11. The present application does not limit the connection method between the first end 122 and the second end 123 and the limiting mechanism 11, and it is only necessary that the limiting mechanism 11 can support the concave portion 121 through the first end 122 and the second end 123.

[0050] like Figure 5 As shown, as another embodiment, the explosion-proof mechanism 12 is a concave portion 121, and the opening of the concave portion 121 faces the limiting mechanism 11. The two ends of the concave portion 121 abut against the limiting mechanism 11. The two ends of the concave portion 121 can abut against the limiting mechanism 11, so that the limiting mechanism 11 can support the concave portion 121.

[0051] It can be understood that when the box cover 22 is subjected to a preset impact force, the box cover 22 applies a force to the concave portion 121 away from the box body 21 through the first fastener 13. At this time, the concave portion 121 is supported by the limiting mechanism 11 so that the concave portion 121 can be deformed when subjected to the force of the first fastener 13, so that the first fastener 13 can move relative to the limiting mechanism 11 in a direction away from the box body 21, thereby enabling the box cover 22 to move relative to the box body 21 and form a pressure relief gap. Such a configuration can further simplify the structure of the explosion-proof mechanism 12, thereby reducing the production cost of the explosion-proof mechanism 12.

[0052] It should be noted that when the opening of the concave portion 121 faces the limiting mechanism 11, the first end 122 and the second end 123 are provided at both ends of the concave portion 121, which is a structural form of the explosion-proof mechanism 12. Therefore, when the opening of the concave portion 121 faces the limiting mechanism 11, the present application does not limit whether the first end 122 and the second end 123 are provided at both ends of the concave portion 121.

[0053] In another embodiment, the structural strength of the limiting mechanism 11 is greater than the structural strength of the concave portion 121 .

[0054] Specifically, the structural strength of the limiting mechanism 11 is greater than the structural strength of the concave portion 121, which may be due to the concave portion 121 having at least one notch 1211 (such as Figure 6 As shown, the concave portion 121 is provided with at least one through hole 1212 (as shown Figure 7As shown), the material strength of the limiting mechanism 11 is greater than the material strength of the concave portion 121. It can be understood that in order to make the structural strength of the limiting mechanism 11 greater than the structural strength of the concave portion 121, the above three methods can be combined, as long as at least one of them is present, for example: at least one notch 1211 and at least one through hole 1212 are provided on the concave portion 121 at the same time, or at least one notch 1211 is provided on the concave portion 121 and the material strength of the limiting mechanism is greater than the material strength of the concave portion 121. Therefore, in the present application, there is no restriction on the form of reducing the structural strength of the concave portion 121.

[0055] It can be understood that by providing the notch 1211 and the through hole 1212 , the strength of the concave portion 121 can be structurally reduced so that when the concave portion 121 is subjected to the force of the first fastener 13 , the concave portion 121 can be deformed more easily than the limiting mechanism 11 .

[0056] When the material strength of the limiting mechanism 11 is greater than the material strength of the concave portion 121, the concave portion 121 can be deformed more easily than the limiting mechanism 11 when subjected to the force of the first fastener 13, so that when the concave portion 121 is subjected to the force of the first fastener 13, the concave portion 121 can be deformed more easily than the limiting mechanism 11. At the same time, since the strength of the concave portion 121 is less than the strength of the limiting mechanism 11, the concave portion 121 is more likely to break than the limiting mechanism 11, and the broken concave portion 121 no longer limits the first fastener 13, so that the first fastener 13 can move a greater distance relative to the limiting mechanism 11, and then increase the pressure relief gap formed between the box cover 22 and the box body 21, which is conducive to improving the pressure relief effect of the pressure relief gap.

[0057] like Figure 6 As shown, as an embodiment, the concave portion 121 includes an integrally formed transverse plate 1213, a first longitudinal plate 1214 and a second longitudinal plate 1215. The first longitudinal plate 1214 and the second longitudinal plate 1215 are respectively arranged on both sides of the transverse plate 1213, and the transverse plate 1213 is connected to the first fastener 13. The transverse plate 1213 can be deformed after being subjected to the force of the first fastener 13, and the first longitudinal plate 1214 and the second longitudinal plate 1215 can also be deformed when being pulled by the deformation of the transverse plate 1213, thereby facilitating the deformation degree of the transverse plate 1213. There is a gap between the transverse plate 1213 and the limiting mechanism 11, thereby providing a deformation space for the concave portion 121 when it is deformed, thereby facilitating the first fastener 13 to move relative to the limiting mechanism 11 in a direction away from the box body 21, so that a pressure relief gap is formed between the box cover 22 and the box body 21 for pressure relief.

[0058] Optionally, the first longitudinal plate 1214 is connected to or integrally formed with the first end 122, and the second longitudinal plate 1215 is connected to or integrally formed with the second end 123. The notch 1211 and / or the through hole 1212 are located on the first longitudinal plate 1214 and the second longitudinal plate 1215. By providing the notch 1211 or the through hole 1212 on the first longitudinal plate 1214, the connection area between the transverse plate 1213 and the first end 122 can be reduced, and by providing the notch 1211 or the through hole 1212 on the second longitudinal plate 1215, the connection area between the transverse plate 1213 and the second end 123 can be reduced. Through the above-mentioned arrangement, the notch 1211 or the through hole 1212 can structurally reduce the strength of the concave portion 121, so that when the concave portion 121 is subjected to the force of the first fastener 13, the concave portion 121 can be easily deformed, thereby facilitating the first fastener 13 to move relative to the limiting mechanism 11 in the direction away from the box body 21, so that a pressure relief gap is formed between the box cover 22 and the box body 21 for pressure relief.

[0059] It can be understood that the notch 1211 and the through hole 1212 are arranged on the first longitudinal plate 1214 and the second longitudinal plate 1215, so as to avoid the notch 1211 and the through hole 1212 from interfering with the connection between the transverse plate 1213 and the first fastener 13. At the same time, the notch 1211 and the through hole 1212 also make it possible for the first longitudinal plate 1214 and the second longitudinal plate 1215 to break when the concave portion 121 is excessively subjected to the force of the first fastener 13, thereby releasing the restriction of the first longitudinal plate 1214 and the second longitudinal plate 1215 on the transverse plate 1213 and the first fastener 13, so that the first fastener 13 can increase the moving distance relative to the concave portion 121, thereby increasing the pressure relief gap between the box cover 22 and the box body 21, which is conducive to improving the pressure relief effect of the pressure relief gap.

[0060] It should be noted that the present application does not limit the position, form and quantity of the notches 1211 and the through holes 1212 arranged on the first longitudinal plate 1213 and the second longitudinal plate 1215 .

[0061] like Figure 6As shown, as an embodiment, the concave portion 121 is provided with a second through hole 1216 for the first fastener 13 to pass through, so as to facilitate the connection between the first fastener 13 and the concave portion 121. The concave portion 121 is provided with a mounting nut 18 corresponding to the second through hole 1216, and the first fastener 13 is passed through the second through hole 1216 and fixedly connected with the mounting nut 18. When the box cover 22 is subjected to a preset impact force, the box cover 22 applies a force away from the box body 21 to the first fastener 13. At this time, through the connection between the first fastener 13 and the mounting nut 18, the first fastener 13 can apply a force away from the box body 21 to the concave portion 121 through the mounting nut 18, so that the concave portion 121 is deformed, and then the first fastener 13 can move relative to the limiting mechanism 11 in a direction away from the box body 21, and then the box cover 22 moves away from the box body 21. Through the above steps, a pressure relief gap is formed between the box cover 22 and the box body 21, so that the pressure generated by the explosion inside the box body 21 can be released from the pressure relief gap, thereby reducing the impact force on the box cover 22 and avoiding the box cover 22 being blown away.

[0062] In some embodiments, the mounting nut 18 is fixed to the concave portion 121 by welding, thereby improving the connection stability between the mounting nut 18 and the concave portion 121, and further improving the stability when the mounting nut 18 applies a force to the concave portion 121. It should be noted that the mounting nut 18 can be arranged on the side of the concave portion 121 facing the box body 21 or the side of the concave portion 121 facing the box cover 22 or arranged in the second through hole 1216, and the present application does not limit the installation position of the mounting nut 18.

[0063] like Figure 7 As shown, in some embodiments, the mounting nut 18 can be a floating nut, which is arranged on the side of the concave portion 121 facing the box body 21. Since the floating nut itself has a certain deformation ability, the overall deformation ability of the explosion-proof mechanism 12 can be improved, which is conducive to increasing the degree of movement of the first fastener 13 relative to the limiting mechanism 11, so that the box cover 22 can be more away from the box body 21, and then a larger pressure relief gap can be formed between the box body 21 and the box cover 22. A larger pressure relief gap is conducive to improving the pressure relief effect, thereby improving the explosion-proof performance of the explosion-proof device 100. In addition, the floating nut can offset the assembly error of the first fastener 13, which is conducive to the connection between the first fastener 13 and the limiting mechanism 11.

[0064] like Figure 8As shown, as an embodiment, the limiting mechanism 11 includes a third end 111, a fourth end 112 and a limiting portion 113, the limiting portion 113 is concave, and the third end 111 and the fourth end 112 are respectively arranged at two ends of the limiting portion 113. In some embodiments, the third end 111 and the fourth end 112 are connected to the box body 21 by bolts, so as to achieve a fixed connection between the limiting portion 113 and the box body 21. A first space is formed between at least a portion of the limiting portion 113 and the box body 21, and the first space can provide a deformation space for the explosion-proof mechanism 12, so that there is a certain space to accommodate the deformation of the explosion-proof mechanism 12 relative to the limiting mechanism.

[0065] Specifically, the first fastener 13 is disposed through the limiting portion 113. When the concave portion 121 is separated from the box body 21 or the limiting mechanism 11, the limiting portion 113 can limit the concave portion 121, thereby preventing the concave portion 121 from being separated from the first space, thereby preventing the first fastener 13 from being separated from the limiting mechanism 11, and then preventing the box cover 22 from being separated from the box body 21, thereby improving the explosion-proof effect of the explosion-proof device 100.

[0066] More specifically, when the first fastener 13 passes through the box cover 22 and the stopper 113 and is connected to the concave portion 121, the stopper 113 also abuts against the box cover 22. By abutting the stopper 113 against the box cover 22, the box cover 22 can be stably connected to the stopper 113, and the box cover 22 is prevented from shaking during normal use.

[0067] like Fig. 9 As shown, as an embodiment, the present application further provides an explosion-proof box 200, which includes a box body 21 and a box cover 22, and the box body 21 and the box cover 22 are connected through an explosion-proof device 100. In some embodiments, the limiting mechanism 11 is fixedly connected to the box body 21 by bolts, and the first fastener 13 can be a bolt, which is passed through the box cover 22 and the limiting mechanism 11 and connected to the explosion-proof mechanism 12, and the first fastener 13 is connected to the mounting nut 18 on the concave portion 121, so that the box body 21 and the box cover 22 are connected through the explosion-proof device 100, so that the explosion-proof device 100 plays an explosion-proof role on the box cover 22.

[0068] In this application, the pressure relief process of the explosion-proof box 200 is as follows:

[0069] First, when the electronic components inside the box body 21 explode, the pressure inside the box body 21 increases sharply, and the box cover 22 is subjected to a preset impact force, so that the box cover 22 has a tendency to move away from the box body 21 .

[0070] Secondly, the box cover 22 with a tendency to move away from the box body 21 can exert a force on the first fastener 13 away from the box body 21. Then, through the connection between the first fastener 13 and the mounting nut 18, the mounting nut 18 can exert a force on the concave portion 121 toward the box cover 22.

[0071] Then, when the concave portion 121 is subjected to the force of the mounting nut 18, the concave portion 121 can be deformed toward the box cover 22, so that the first fastener 13 can move away from the box body 21 relative to the limiting mechanism 11, thereby separating the box cover 22 and the box body 21, so that a pressure relief gap is formed between the box cover 22 and the box body 21. The pressure in the box body 21 can be released from the pressure relief gap, thereby reducing the impact force on the box cover 22, avoiding the box cover 22 from being blown away by excessive impact force, and thus improving the explosion-proof performance and safety of the explosion-proof box 200.

[0072] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. An explosion-proof device for connecting a box body and a box cover, characterized in that: The explosion-proof device comprises: A limiting mechanism, wherein the limiting mechanism is located outside the box and is fixedly connected to the box, and a first space is formed between the limiting mechanism and the box; An explosion-proof mechanism, wherein the explosion-proof mechanism is located in the first space, and there is a gap between the explosion-proof mechanism and the limiting mechanism; A first fastener is provided through the box cover and the limiting mechanism and is connected to the explosion-proof mechanism, wherein the explosion-proof mechanism can be deformed when the box cover is subjected to a preset impact force.

2. The explosion-proof device according to claim 1, characterized in that: The explosion-proof mechanism comprises: A concave portion, a gap exists between the concave portion and the limiting mechanism, the first fastener is connected to the concave portion, and the concave portion can be deformed when the box cover is subjected to a preset impact force; A first end and a second end, wherein the first end and the second end are respectively arranged at two ends of the concave portion.

3. The explosion-proof device according to claim 2, characterized in that: The opening of the concave portion faces the box body, and the first end and the second end are respectively connected to the box body.

4. The explosion-proof device according to claim 3, characterized in that: The explosion-proof device also includes a first fixing member and a second fixing member, and the limiting mechanism also includes a third end and a fourth end. The first fixing member fixes and connects the first end of the explosion-proof mechanism, the third end of the limiting mechanism and the box body, and the second fixing member fixes and connects the second end of the explosion-proof mechanism, the fourth end of the limiting mechanism and the box body.

5. The explosion-proof device according to claim 2, characterized in that: The opening of the concave portion faces the limiting mechanism, and the first end and the second end are respectively connected to the limiting mechanism.

6. The explosion-proof device according to claim 2, characterized in that: The opening of the concave portion faces the limiting mechanism, and the first end and the second end are respectively in contact with the limiting mechanism.

7. The explosion-proof device according to claim 1, characterized in that: The explosion-proof mechanism is a concave portion, the opening of the concave portion faces the limiting mechanism, and two ends of the concave portion abut against the limiting mechanism.

8. The explosion-proof device according to any one of claims 2 to 7, characterized in that: The structural strength of the limiting mechanism is greater than the structural strength of the concave portion.

9. The explosion-proof device according to claim 8, characterized in that: The structural strength of the limiting mechanism is greater than the structural strength of the concave portion, including: At least one of the following three methods is adopted: the concave portion is provided with at least one notch; the concave portion is provided with at least one through hole; and the material strength of the limiting mechanism is greater than the material strength of the concave portion.

10. The explosion-proof device according to claim 9, characterized in that: The concave portion is provided with a second through hole for the first fastener to pass through, and a mounting nut is provided on the concave portion corresponding to the second through hole. The first fastener is passed through the second through hole and is fixedly connected to the mounting nut, so that when the box cover is subjected to a preset impact force, the mounting nut applies a force toward the box cover to the concave portion.

11. An explosion-proof box, characterized in that: The explosion-proof box comprises: The explosion-proof device according to any one of claims 1 to 10; A box body and a box cover, wherein the box body and the box cover are connected through the explosion-proof device.

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