Explosion-proof device and device assembly

Abstract

The utility model discloses explosion-proof equipment and an equipment assembly, and belongs to the technical field of explosion-proof equipment design. The explosion-proof equipment is used for being connected with electrical equipment, the explosion-proof equipment comprises a shell, a first circuit assembly, a second circuit assembly, a blocking plate and a protection part, the shell is provided with an inner cavity, the blocking plate is used for blocking the inner cavity, the inner cavity is divided into a first inner cavity and a second inner cavity by the protection part, and the first inner cavity and the second inner cavity can be communicated with each other. The first circuit assembly is arranged in the first inner cavity, and the second circuit assembly is arranged in the second inner cavity; the protection piece is provided with a first opening, one end of a first connecting line of the second circuit assembly penetrates through the first opening and is connected with the first circuit assembly, and a second connecting line of the second circuit assembly is used for being connected with the electrical equipment. According to the scheme, the problems that according to explosion-proof equipment related to the related technology, normal work of electrical equipment is easily affected, and the production cost is high can be solved.

Description

Technical Field

[0001] This application belongs to the technical field of explosion-proof equipment design, and particularly relates to an explosion-proof equipment and equipment components. Background Art

[0002] In explosion-proof areas, explosion-proof equipment is usually provided. The controller and power supply at the remote end are connected to the electrical equipment on-site through the explosion-proof equipment, such as being connected to the instrument equipment on-site. The explosion-proof equipment can input and output control signals to the electrical equipment on-site. The explosion-proof equipment usually has a circuit component, which can be an increased safety type circuit component or an intrinsically safe type circuit component. This circuit component is used to connect to multiple electrical equipment on-site, that is, this circuit component is connected to multiple on-site signals.

[0003] Taking the circuit component being an increased safety type circuit component as an example, when one or more on-site signals fail while other signals are working normally, according to explosion-proof requirements, after the entire explosion-proof equipment is powered off, the signal transmission line between the increased safety type circuit component and the electrical equipment can be disassembled and repaired to avoid the tool for disassembly and repair touching the increased safety type circuit and generating an electric arc or spark, that is, to improve the safety of the entire maintenance process. However, if the entire explosion-proof equipment is powered off, the other normally working signals will also be interfered, which is likely to affect the normal operation of other electrical equipment; taking the circuit component being an intrinsically safe type circuit component as an example, although when disassembling and repairing the signal transmission line between the intrinsically safe type circuit component and the electrical equipment, the entire explosion-proof equipment does not need to be powered off and the disassembly and repair work can be carried out, after the entire circuit component is designed as an intrinsically safe type circuit component, the production cost is likely to increase.

[0004] In summary, the explosion-proof equipment involved in the related technology has problems of being likely to affect the normal operation of electrical equipment and having a relatively high production cost. Utility Model Content

[0005] This application discloses an explosion-proof equipment and equipment components to solve the problems that the explosion-proof equipment involved in the related technology is likely to affect the normal operation of electrical equipment and has a relatively high production cost.

[0006] To solve the above technical problems, this application adopts the following technical solutions:

[0007] An explosion-proof equipment for connecting to electrical equipment, the explosion-proof equipment includes a housing, a first circuit component, a second circuit component, a sealing plate, and a protective member.

[0008] The housing has an inner cavity, the sealing plate is used to seal the inner cavity, the protective member divides the inner cavity into a first inner cavity and a second inner cavity that can communicate with each other. The first circuit component is arranged in the first inner cavity, and the second circuit component is arranged in the second inner cavity.

[0009] The protective member is provided with a first opening, one end of the first connecting wire of the second circuit component passes through the first opening and is connected to the first circuit component, and the second connecting wire of the second circuit component is used to be connected to the electrical equipment.

[0010] An equipment component includes an electrical equipment and the explosion-proof equipment described above. The housing is provided with a wire passing hole, and one end of the second connecting wire passes through the wire passing hole and is connected to the electrical equipment;

[0011] The number of the electrical equipment is at least two, the number of the wire passing holes is at least two, the wire passing holes are arranged at intervals, the number of the second connecting wires is at least two, each of the second connecting wires corresponds to one of the wire passing holes one by one, and each of the second connecting wires corresponds to one of the electrical equipment one by one and is connected.

[0012] The technical solution adopted in this application can achieve the following beneficial effects:

[0013] In this application, since the protective member divides the inner cavity into a first inner cavity and a second inner cavity that can communicate with each other, the first circuit component is arranged in the first inner cavity, and the second circuit component is arranged in the second inner cavity, that is, the first circuit component and the second circuit component are separated by the protective member. At the same time, the second circuit component used to be connected to the electrical equipment can be an intrinsically safe circuit component, and since the protective member has a certain protection ability, when the second circuit component is connected to multiple electrical equipment through multiple second connecting wires and one or more of the second connecting wires fail, the operator can only disassemble and maintain the second connecting wire, and during the disassembly and maintenance process, the disassembly and maintenance tools are not easy to touch the first circuit component, which can improve the safety of the entire maintenance process. At the same time, the other second connecting wires do not need to be powered off, that is, the other electrical equipment can work normally, and since this application uses some circuit components in the explosion-proof equipment as intrinsically safe circuit components, this can reduce the production cost to a certain extent. Therefore, the explosion-proof equipment disclosed in this application can solve the problems that the explosion-proof equipment involved in the related technology is likely to affect the normal operation of the electrical equipment and has a relatively high production cost. Description of the Drawings

[0014] Figure 1 It is a schematic cross-sectional structure view of the first explosion-proof equipment disclosed in the embodiment of this application;

[0015] Figure 2 It is a schematic internal structure view of the first explosion-proof equipment disclosed in the embodiment of this application;

[0016] Figure 3 It is a schematic partial structure view of the first explosion-proof equipment disclosed in the embodiment of this application;

[0017] Figure 4 andFigure 5 External structural schematic diagram of the first explosion-proof device disclosed in the embodiment of the present application;

[0018] Figure 6 Cross-sectional structural schematic diagram of the second explosion-proof device disclosed in the embodiment of the present application;

[0019] Figure 7 Partial structural schematic diagram of the second explosion-proof device disclosed in the embodiment of the present application;

[0020] Figure 8 and Figure 9 External structural schematic diagram of the second explosion-proof device disclosed in the embodiment of the present application;

[0021] Figure 10 Structural schematic diagram of the device component disclosed in the embodiment of the present application.

[0022] Explanation of reference numerals:

[0023] 100 - Electrical equipment;

[0024] 200 - Housing, 210 - Inner cavity, 211 - First inner cavity, 212 - Second inner cavity, 213 - Inner wall, 220 - Second opening, 230 - Fourth opening, 240 - Fifth opening, 250 - Wire passing hole;

[0025] 300 - First circuit component, 310 - Third connection line;

[0026] 400 - Second circuit component, 410 - First connection line, 420 - Second connection line;

[0027] 500 - Sealing plate, 510 - First sealing plate, 520 - Second sealing plate;

[0028] 600 - Protective member, 610 - First opening, 620 - Third opening, 630 - First sub-opening;

[0029] 700 - Partition plate, 710 - Second sub-opening;

[0030] 800 - Safety barrier. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0032] The following will, in conjunction with the accompanying drawings, elaborate on the explosion-proof equipment disclosed in the embodiments of the present application through specific embodiments and their application scenarios in detail.

[0033] Please refer to Figures 1 - 10 , the present application discloses an explosion-proof equipment, and the disclosed explosion-proof equipment includes a housing 200, a first circuit component 300, a second circuit component 400, a sealing plate 500, and a protection component 600.

[0034] The explosion-proof equipment disclosed in the present application is used to be connected to an electrical equipment 100, and the electrical equipment 100 can be various instrument equipment on the detection pipeline. The housing 200 is a basic component of the explosion-proof equipment, which can provide an installation basis for other components of the explosion-proof equipment. For example, it provides an installation basis for the first circuit component 300, the second circuit component 400, the sealing plate 500, and the protection component 600. Moreover, the first circuit component 300, the second circuit component 400, and the protection component 600 are all arranged in the inner cavity 210 of the housing 200, that is, the housing 200 has an inner cavity 210, and the sealing plate 500 is used to seal the inner cavity 210. Thus, it can be seen that the housing 200 and the sealing plate 500 are peripheral components of the explosion-proof equipment, which enables the housing 200 and the sealing plate 500 to be both used to protect the first circuit component 300, the second circuit component 400, and the protection component 600.

[0035] Please refer to Figure 1 and Figure 6 , the protection component 600 can divide the inner cavity 210 into a communicable first inner cavity 211 and a second inner cavity 212. The first circuit component 300 is arranged in the first inner cavity 211, and the second circuit component 400 is arranged in the second inner cavity 212, that is, the first circuit component 300 and the second circuit component 400 are separated by the protection component 600 to avoid mutual influence between the two. Optionally, the first circuit component 300 can be an increased safety type circuit component, and the second circuit component 400 can be an intrinsically safe type circuit component, that is, the first inner cavity 211 can be an increased safety cavity, and the second inner cavity 212 can be an intrinsically safe cavity.

[0036] The protective member 600 is provided with a first opening 610. One end of the first connecting wire 410 of the second circuit assembly 400 passes through the first opening 610 and is connected to the first circuit assembly 300. That is, the first circuit assembly 300 and the second circuit assembly 400 achieve the effect of electrical connection through the first connecting wire 410. And the second connecting wire 420 of the second circuit assembly 400 is used to be connected to the electrical device 100. That is, the second circuit assembly 400 and the electrical device 100 achieve the effect of electrical connection through the first connecting wire 410. During the process of specifically repairing the second connecting wire 420 and the connection between the second connecting wire 420 and the second circuit assembly 400, since the protective member 600 has a protective function, that is, the protective member 600 can protect the first circuit assembly 300, and since the second circuit assembly 400 connected to the electrical device 100 can be an intrinsically safe circuit assembly, therefore, the explosion-proof device does not need to be powered off, and the operator can open the sealing plate 500 for maintenance.

[0037] In this application, since the protective member 600 divides the inner cavity 210 into a first inner cavity 211 and a second inner cavity 212 that can communicate with each other, the first circuit assembly 300 is arranged in the first inner cavity 211, and the second circuit assembly 400 is arranged in the second inner cavity 212. That is, the first circuit assembly 300 and the second circuit assembly 400 are separated by the protective member 600. At the same time, the second circuit assembly 400 used to be connected to the electrical device 100 can be an intrinsically safe circuit assembly, and since the protective member 600 has a certain protective ability, therefore, when the second circuit assembly 400 is connected to multiple electrical devices 100 through multiple second connecting wires 420 and one or more of the second connecting wires 420 fail, the operator can only disassemble and maintain the second connecting wire 420, and during the disassembly and repair process, the disassembly and repair tools are not easy to touch the first circuit assembly 300, which can improve the safety of the entire maintenance process. At the same time, the other second connecting wires 420 do not need to be powered off, that is, the other electrical devices 100 can work normally, and since this application uses some circuit assemblies in the explosion-proof device as intrinsically safe circuit assemblies, this can reduce the production cost to a certain extent. Therefore, the explosion-proof device disclosed in this application can solve the problems that the explosion-proof device involved in the related art is likely to affect the normal operation of the electrical device 100 and has a relatively high production cost.

[0038] Please refer to Figures 6 - 9 , the housing 200 can be provided with a second opening 220, the second inner cavity 212 is connected to the second opening 220, and the sealing plate 500 can be connected to the housing 200 to seal the second opening 220, thereby sealing the inner cavity 210.

[0039] Optionally, the protective member 600 may be a bent protective plate, that is, the protective member 600 only has a first part separating the first inner cavity 211 and the second inner cavity 212 and a second part disposed toward the second opening 220. The first part and the second part may be integrally provided, and the bent protective plate is connected to the inner wall 213 of the inner cavity 210 to enclose the first inner cavity 211, that is, the periphery of the first circuit component 300 is provided with the protective member 600 and the housing 200. When the operator opens the plugging plate 500 to repair the second connection line 420, since the first circuit component 300 does not leak out, this can ensure the protection effect on the first circuit component 300.

[0040] In another embodiment, the protective member 600 may include a protective cover. The end of the protective cover is connected to the inner wall 213 of the inner cavity 210 to enclose the first inner cavity 211. A part of the protective cover faces the second opening 220, that is, the protective cover can cover the first circuit component 300 to protect the first circuit component 300 from all angles, so as to further improve the protection effect on the first circuit component 300.

[0041] Optionally, according to the above embodiment, the protective member 600 may include a protective cover. The end of the protective cover may be connected to the inner wall 213 of the inner cavity 210 to enclose the first inner cavity 211.

[0042] In another embodiment, please refer to Figures 1 - 3 , the end of the protective cover may be connected to the inner wall 213 of the inner cavity 210 to enclose the second inner cavity 212, that is, the periphery of the second circuit component 400 is provided with the protective member 600 and the housing 200. During the process of the operator disassembling and repairing the second connection line 420, since the periphery of the second circuit component 400 is provided with a protective cover, therefore, it is not easy for the repair tool to touch the first circuit component 300. At the same time, since the volume of the second circuit component 400 is usually smaller than the volume of the first circuit component 300, therefore, the size of the protective cover used in the embodiment of the present application is smaller, and thus the space occupied by the protective member 600 is smaller, and the production cost of the protective member 600 is lower. In addition, to facilitate the connection of the second connection line 420 to the electrical device 100, a third opening 620 may be formed in the protective cover. After one end of the second connection line 420 passes through the third opening 620, it can be used to connect to the electrical device 100.

[0043] Optionally, please refer to Figure 1 and Figure 2, the explosion-proof device may further include a partition plate 700 disposed between the protective cover and the second circuit component 400 or between the protective cover and the first circuit component 300. That is, in addition to the protective member 600 being provided between the first circuit component 300 and the second circuit component 400, a partition plate 700 is also provided. This enables the protective member 600 and the partition plate 700 to have a dual protective effect on the first circuit component 300, that is, this setting method has a better protective effect on the first circuit component 300.

[0044] In addition, to facilitate the connection between the first circuit component 300 and the second circuit component 400, the first opening 610 may include a first sub-opening 630 formed in the protective cover and a second sub-opening 710 formed in the partition plate 700. One end of the first connection line 410 may pass through the first sub-opening 630 and the second sub-opening 710 and be connected to the first circuit component 300. Of course, the explosion-proof device may also not include the partition plate 700.

[0045] Optionally, please refer to Figures 1 - 5 , the housing 200 may be provided with a fourth opening 230 communicating with the first inner cavity 211 and a fifth opening 240 communicating with the second inner cavity 212. The above-mentioned third opening 620 may be arranged facing the fifth opening 240. The plugging plate 500 may be only a relatively large plugging plate 500, so that the plugging plate 500 is connected to the housing 200 to plug the fourth opening 230 and the fifth opening 240 at the same time.

[0046] In another embodiment, the plugging plate 500 may include a first plugging plate 510 and a second plugging plate 520 arranged at intervals. The first plugging plate 510 may be connected to a part of the housing 200 and a part of the partition plate 700 to plug the fourth opening 230. The second plugging plate 520 may be connected to another part of the housing 200 and another part of the partition plate 700 to plug the fifth opening 240. That is, the fourth opening 230 and the fifth opening 240 may be plugged by different plugging plates 500. When repairing the second connection line 420, the operator can only open the second plugging plate 520. Since the weight of the second plugging plate 520 is relatively light, this can facilitate the operator to disassemble or install the second plugging plate 520. And, since the operator does not need to open the first inner cavity 211, that is, does not need to open the first plugging plate 510, therefore, this can further ensure the protective effect on the first circuit component 300.

[0047] Optionally, to ensure the sealing effect of the first sealing plate 510 on the fourth opening 230 and the sealing effect of the second sealing plate 520 on the fifth opening 240, the explosion-proof device may further include a first sealing member and a second sealing member. The first sealing member may be disposed between the first sealing plate 510 and the fourth opening 230 and is in sealing cooperation with both the first sealing plate 510 and the fourth opening 230. The second sealing member may be disposed between the second sealing plate 520 and the fifth opening 240 and is in sealing cooperation with both the second sealing plate 520 and the fifth opening 240.

[0048] Optionally, in the height direction of the explosion-proof device, there may be a first preset distance between the partition plate 700 and the protective cover, and the first preset distance may be less than or equal to 2.5 mm. That is, in the specific design process, the distance between the partition plate 700 and the protective cover can be made not greater than 2.5 mm, which can prevent solid foreign objects with a diameter greater than 2.5 mm from entering between the partition plate 700 and the protective cover and entering the first inner cavity 211 through the first sub-opening 630 or the second sub-opening 710, thereby avoiding affecting the protection effect on the first circuit component 300. Of course, the first preset distance may also be greater than 2.5 mm.

[0049] Optionally, the part of the second circuit component 400 connected to the second connection line 420 may not protrude beyond the third opening 620.

[0050] In another embodiment, please refer to Figures 1 - 3 , the part of the second circuit component 400 connected to the second connection line 420 protrudes beyond the third opening 620, that is, the position of the second circuit component 400 connected to the second connection line 420 needs to be outside the protective member 600, so as to facilitate the operator to install or disassemble the second connection line 420 on the second circuit component 400.

[0051] Optionally, in the height direction of the explosion-proof device, there may be a second preset distance between the edge of the third opening 620 and the second circuit component 400, and the second preset distance may be less than or equal to 2.5 mm. That is, in the specific design process, the distance between the protective member 600 and the second circuit component 400 can be made not greater than 2.5 mm, which can prevent solid foreign objects with a diameter greater than 2.5 mm from entering the second inner cavity 212 and entering the first inner cavity 211 through the first opening 610, thereby avoiding affecting the protection effect on the first circuit component 300. Of course, the second preset distance may also be greater than 2.5 mm.

[0052] Optionally, please refer to Figure 10, the explosion-proof device may further include a safety barrier 800 disposed in the first inner cavity 211. The first circuit component 300 is connected to the first connection line 410 through the safety barrier 800. The safety barrier 800 can limit the electrical signal sent from the first circuit component 300 to the second circuit component 400, and can also limit the dangerous energy sent from the second circuit component 400 to the first circuit component 300, so as to improve the operation stability and safety of the entire explosion-proof device. Of course, the explosion-proof device may not include the safety barrier 800.

[0053] To further ensure the operation stability and safety of the explosion-proof device, the housing 200 and the sealing plate 500, as the peripheral components of the explosion-proof device, both need to have a certain ability to prevent water and dust, that is, have a certain protection level, and the protection levels of the housing 200 and the sealing plate 500 can be greater than or equal to the first protection level. The protection member 600 also needs to have a certain protection level, and the protection level of the protection member 600 can be greater than or equal to the second protection level. Optionally, the second protection level can be equal to or greater than the first protection level.

[0054] In another embodiment, since the housing 200 and the sealing plate 500 are the peripheral components of the explosion-proof device, therefore, the protection levels of the housing 200 and the sealing plate 500 are usually relatively high, and this already meets the conventional protection requirements of the explosion-proof device. Therefore, the second protection level can be less than the first protection level to reduce the production cost of the explosion-proof device while ensuring the protection effect on the first circuit component 300.

[0055] Optionally, the first protection level of the housing 200 and the sealing plate 500 can be IP54, and the second protection level of the protection member 600 can be IP30. Of course, the embodiments of the present application do not make specific limitations on this, as long as the protection levels of the housing 200, the sealing plate 500, and the protection member 600 all meet the conventional protection requirements of the explosion-proof device.

[0056] Optionally, to facilitate the electrical connection between the first circuit component 300 and the second circuit component 400, a joint meeting the explosion-proof requirements of IP30 can be provided at the first opening 610. Specifically, the joint is provided at the second sub-opening 710 opened on the partition plate 700 described above in front of the first opening 610. One end of the first connection line 410 can be electrically connected to one side of the joint, and one end of the third connection line 310 of the first circuit component 300 can be electrically connected to the other side of the joint, so that the first connection line 410 and the third connection line 310 are electrically connected through the joint, and further the first circuit component 300 and the second circuit component 400 are electrically connected. That is, during the specific process of electrically connecting the first circuit component 300 and the second circuit component 400 by the operator, only the first connection line 410 and the third connection line 310 need to be electrically connected to the joint respectively.

[0057] Optionally, please refer to Figure 10 , the present application also discloses a device component, including an electrical device 100 and the explosion-proof device described above. A wire passing hole 250 may be formed at the bottom of the housing 200. One end of the second connecting wire 420 passes through the wire passing hole 250 and is connected to the electrical device 100.

[0058] The number of electrical devices 100 may be at least two. Correspondingly, the number of wire passing holes 250 is also at least two. The wire passing holes 250 are arranged at intervals. The number of second connecting wires 420 is also at least two. Each second connecting wire 420 corresponds to one of the wire passing holes 250, and each second connecting wire 420 corresponds to one of the electrical devices 100 and is connected thereto. Thus, the explosion-proof device can be connected to multiple electrical devices 100 simultaneously, so that the remote controller can control the working states of multiple electrical devices 100 through the explosion-proof device, or multiple electrical devices 100 can transmit electrical signals to the remote controller through the explosion-proof device simultaneously.

[0059] In the above embodiments of the present application, the differences between the embodiments are mainly described. As long as the different optimization features between the embodiments are not contradictory, they can be combined to form a more optimal embodiment. For the sake of brevity of the description, they will not be elaborated herein.

[0060] The above are only the embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. An explosion-proof device, used to be connected to an electrical device (100), characterized in that: The explosion-proof device comprises a housing (200), a first circuit assembly (300), a second circuit assembly (400), a blocking plate (500) and a protective member (600). The housing (200) has an inner cavity (210); the blocking plate (500) is used to block the inner cavity (210); the protective member (600) separates the inner cavity (210) into a first inner cavity (211) and a second inner cavity (212) that are communicable; the first circuit component (300) is disposed in the first inner cavity (211); and the second circuit component (400) is disposed in the second inner cavity (212); The protective member (600) is provided with a first opening (610), one end of a first connecting line (410) of the second circuit assembly (400) passes through the first opening (610) and is connected to the first circuit assembly (300), and a second connecting line (420) of the second circuit assembly (400) is used to be connected to the electrical device (100).

2. The explosion-proof device according to claim 1, characterized in that: The protective member (600) comprises a protective cover, an end of which is connected to an inner wall (213) of the inner cavity (210) to enclose the first inner cavity (211); the shell (200) is provided with a second opening (220); a portion of the protective cover faces the second opening (220), and the second inner cavity (212) is communicated with the second opening (220); the blocking plate (500) can be connected to the shell (200) to block the second opening (220).

3. The explosion-proof device according to claim 1, characterized in that: The protective member (600) comprises a protective cover, the end of which is connected to the inner wall (213) of the inner cavity (210) to enclose the second inner cavity (212), and the protective cover is provided with a third opening (620), one end of the second connecting line (420) passes through the third opening (620) and is used to be connected to the electrical device (100).

4. The explosion-proof device according to claim 2 or 3, characterized in that: The explosion-proof device further comprises a partition plate (700), wherein the partition plate (700) is arranged between the protective cover and the second circuit assembly (400) or between the protective cover and the first circuit assembly (300); the first opening (610) comprises a first sub-opening (630) provided on the protective cover and a second sub-opening (710) provided on the partition plate (700); one end of the first connecting line (410) passes through the first sub-opening (630) and the second sub-opening (710) and is connected to the first circuit assembly (300).

5. The explosion-proof device according to claim 4, characterized in that: The shell (200) is provided with a fourth opening (230) connected to the first inner cavity (211) and a fifth opening (240) connected to the second inner cavity (212); the blocking plate (500) includes a first blocking plate (510) and a second blocking plate (520) which are spaced apart; the first blocking plate (510) can be connected to a portion of the shell (200) and a portion of the partition plate (700) to block the fourth opening (230); the second blocking plate (520) can be connected to another portion of the shell (200) and another portion of the partition plate (700) to block the fifth opening (240).

6. The explosion-proof device according to claim 4, characterized in that: In the height direction of the explosion-proof equipment, there is a first preset distance between the partition plate (700) and the protective cover, and the first preset distance is less than or equal to 2.5 mm.

7. The explosion-proof device according to claim 3, characterized in that: The portion of the second circuit assembly (400) connected to the second connecting line (420) protrudes from the third opening (620), and in the height direction of the explosion-proof equipment, there is a second preset distance between the edge of the third opening (620) and the second circuit assembly (400), and the second preset distance is less than or equal to 2.5 mm.

8. The explosion-proof device according to claim 1, characterized in that: The explosion-proof device further comprises a safety barrier (800), wherein the safety barrier (800) is arranged in the first inner cavity (211), and the first circuit component (300) is connected to the first connecting line (410) via the safety barrier (800).

9. The explosion-proof device according to claim 1, characterized in that: The protection levels of the shell (200) and the blocking plate (500) are greater than or equal to a first protection level, the protection level of the protective element (600) is greater than or equal to a second protection level, and the second protection level is less than the first protection level.

10. A device assembly, characterized in that: Comprising an electrical device (100) and the explosion-proof device according to any one of claims 1 to 9, the housing (200) is provided with a threading hole (250), one end of the second connecting wire (420) passes through the threading hole (250) and is connected to the electrical device (100); The number of the electrical devices (100) is at least two, the number of the threading holes (250) is at least two, and the threading holes (250) are arranged at intervals. The number of the second connecting wires (420) is at least two, and each second connecting wire (420) corresponds one-to-one to each threading hole (250), and each second connecting wire (420) corresponds one-to-one to each electrical device (100), and is connected.

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