Positive pressure ventilation explosion-proof device

Abstract

The utility model discloses a positive pressure ventilation explosion-proof device, and relates to the technical field of petroleum product processing equipment. Comprising a heat insulation cabinet; the protection cabinet is nested in the heat insulation cabinet; the positive pressure ventilation explosion-proof cabinet is arranged in the protection cabinet; and the buffer mechanism is integrated in the heat insulation cabinet and is matched with the protection cabinet. When the positive-pressure ventilation explosion-proof cabinet is affected by the outside and vibrates, the positive-pressure ventilation explosion-proof cabinet drives a buffer plate to apply pressure to a movable rod, the movable rod rotates and drives a movable shell to move at the same time, the movable shell extrudes a spring and extrudes an extrusion rod through a connecting block, the extrusion rod pushes a piston to slowly move in a buffer cylinder, and the positive-pressure ventilation explosion-proof cabinet is driven to rotate. The positive pressure ventilation explosion-proof cabinet is buffered and damped; when the positive-pressure ventilation explosion-proof cabinet is stable, the spring drives the movable shell to rebound, and then the extrusion rod and the piston are driven to move to the original position, so that the problem that the positive-pressure ventilation explosion-proof cabinet is easily driven by the spring to repeatedly oscillate when the positive-pressure ventilation explosion-proof cabinet is subjected to external oscillation in a conventional damping mode is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of petroleum product processing equipment, and in particular to a positive pressure ventilation explosion-proof device. Background Technology

[0002] Petroleum products, as core products of crude oil refining, involve high-temperature and high-pressure processes such as distillation, cracking, and hydrogenation. These processes release volatile organic compounds and flammable gases. When these flammable gases mix with oxygen and reach their explosive limits, they can easily cause safety accidents if exposed to an ignition source. Therefore, positive-pressure explosion-proof electrical control boxes are commonly used in the industrial sector. These boxes create a positive-pressure environment by supplying clean air to the equipment, ensuring that the internal pressure is always higher than the external pressure, effectively preventing the entry of external flammable gases and reducing the risk of explosion. However, traditional positive-pressure explosion-proof devices have significant shortcomings during operation: external vibrations or impacts can easily damage internal components, directly affecting the equipment's lifespan.

[0003] While existing technologies attempt to mitigate the effects of vibration through spring-based damping structures and utilize elastic elements to absorb impact energy, significant drawbacks remain in practical applications. When equipment is subjected to external impact, the springs buffer vibration through deformation, but their elastic recovery characteristics cause the control box to oscillate repeatedly during the buffering process. This continuous shaking not only fails to quickly stabilize the equipment but may also exacerbate fatigue damage to internal electrical components, ultimately affecting the operational reliability of the positive pressure explosion-proof system.

[0004] Based on this, the present invention provides a positive pressure ventilation explosion-proof device to solve the problems existing in the prior art. Utility Model Content

[0005] In view of this, the main purpose of this utility model is to provide a positive pressure ventilation explosion-proof device to solve the problem that when the traditional control box is subjected to vibration, the control box is buffered by springs, which easily causes the control box to oscillate repeatedly during the buffering process, affecting the stability of the equipment during use.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A positive pressure ventilation explosion-proof device, comprising:

[0008] Insulated cabinet, which has a box-like structure;

[0009] The protective cabinet is nested inside the cavity of the insulated cabinet;

[0010] Positive pressure ventilation explosion-proof cabinet, installed inside the protective cabinet;

[0011] The buffer mechanism is integrated into the inner cavity of the heat insulation cabinet and matches the protective cabinet. It includes buffer plates set on both sides of the protective cabinet. The bottom of the buffer plates located on the lower sides of the protective cabinet is rotatably connected to the movable shell through a movable rod. A connecting block is set at the bottom of the movable shell. A pressing rod is set on one side of the connecting block. A piston is set at the other end of the pressing rod. A buffer cylinder is movably set on the outer surface of the piston. The inner wall of the buffer cylinder abuts against the outer surface of the piston.

[0012] In a preferred embodiment, the buffer mechanism further includes a slide rod slidably connected to the inner cavity of the movable shell, with positioning plates at both ends of the slide rod, and the bottom of the positioning plates connected to the inner bottom of the heat insulation cabinet.

[0013] In a preferred embodiment, a spring is fixedly connected to one side of the movable shell, and the other end of the spring is fixedly connected to one side of the positioning plate.

[0014] In a preferred embodiment, the buffer plates are arranged in pairs on both sides of the protective cabinet.

[0015] In a preferred embodiment, a fixed shell is provided at the bottom of the buffer plate located on both sides below the protective cabinet. The inner cavity of the fixed shell is movably connected to a movable rod via a rotating shaft, and the other end of the movable rod is connected to the movable shell via a rotating shaft.

[0016] In a preferred embodiment, the buffer cylinder is disposed between the heat insulation cabinet and the protective cabinet, and is fixedly connected to the heat insulation cabinet.

[0017] In a preferred embodiment, a limiting sleeve is provided on one side of the movable shell, and a limiting rod is slidably connected inside the limiting sleeve. Both ends of the limiting rod are provided with fixing plates, and the bottom of the fixing plates is connected to the inner bottom of the heat insulation cabinet.

[0018] In a preferred embodiment, a limiting block is symmetrically fixedly connected to one side of the buffer plate, and the outer surface of the limiting block is slidably connected to one side of the inner wall of the heat insulation cabinet.

[0019] In a preferred embodiment, fixing blocks are provided on both sides of the fixing shell, and the top of the fixing blocks is connected to the bottom of the buffer plate.

[0020] In a preferred embodiment, the bottom of the heat insulation cabinet is provided with a storage shell, the top of the storage shell is provided with an air pump, and the top of the storage shell is provided with an oil pump on one side of the air pump; and two nozzles are symmetrically arranged on the top of the heat insulation cabinet, one side of the inner wall of the protective cabinet is provided with heat dissipation fins, and one side of the heat insulation cabinet is provided with a semiconductor cooling chip.

[0021] Compared with the prior art, this utility model provides a positive pressure ventilation explosion-proof device, which has the following beneficial effects:

[0022] 1. A dual physical protection system is constructed using an insulated cabinet and a protective cabinet. The insulated cabinet acts as the outer barrier, effectively blocking the impact of the external high-temperature environment on the internal electrical components. The protective cabinet, as the second line of defense, together with the positive pressure ventilation explosion-proof cabinet, forms a three-level protection structure. This nested design not only improves the equipment's adaptability to harsh working conditions but also reduces the risk of flammable gases entering the core area through physical isolation, fundamentally ensuring explosion-proof safety.

[0023] 2. The buffer mechanism adopts a "mechanical transmission + fluid damping" synergistic vibration reduction technology; the moving rod and spring absorb external impact energy through the rotating shaft structure, and the reciprocating motion of the piston in the buffer cylinder uses the fluid damping effect to consume residual vibration; thus avoiding the problem of repeated oscillation, and with the sliding constraint of the limit sleeve and limit rod, it ensures that the equipment can still maintain stable operation in the vibration or collision environment, which greatly reduces the risk of damage to internal components.

[0024] 3. The temperature control system achieves functional integration through the dual-chamber design of the storage shell; the cooling oil in the first chamber is driven by an oil pump and circulates between the heat dissipation fins, rapidly reducing the local temperature rise through phase change heat transfer; the second chamber uses a semiconductor cooling chip for active cooling, forming a closed-loop control with the temperature control switch 8, thus forming a composite solution of "passive liquid cooling + active semiconductor", which not only ensures basic heat dissipation capacity, but also avoids overcooling or overheating through precise temperature adjustment, significantly extending the service life of electrical components.

[0025] 4. The alarm system monitors the internal environment of the insulated cabinet in real time. Once a fire is detected, it immediately triggers an audible and visual alarm and starts the air pump, rapidly releasing high-pressure carbon dioxide gas from the second chamber of the storage shell through a nozzle. This achieves efficient fire extinguishing without affecting the positive pressure explosion-proof environment, providing safety assurance throughout the equipment's entire lifecycle. It also solves the problem of traditional control boxes, which rely on springs to cushion vibrations, causing repeated oscillations during cushioning and affecting the stability of the equipment during use. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the positive pressure ventilation explosion-proof device of this utility model;

[0028] Figure 2 This is a schematic diagram of the structure of this practical heat-insulated cabinet;

[0029] Figure 3 This is a schematic diagram of the buffer mechanism of this utility model;

[0030] Figure 4 This is a cross-sectional structural schematic diagram of the positive pressure ventilation explosion-proof device of this utility model;

[0031] Figure 5 This is a cross-sectional view of the present invention from the rear view angle.

[0032] [Explanation of Key Component Symbols]

[0033] 1. Insulated cabinet; 2. Protective cabinet; 3. Positive pressure ventilation explosion-proof cabinet; 4. Buffer mechanism; 41. Buffer plate; 42. Fixed shell; 43. Movable rod; 44. Movable shell; 45. Connecting block; 46. Extrusion rod; 47. Piston; 48. Buffer cylinder; 49. Slide rod; 410. Positioning plate; 411. Spring; 412. Limit sleeve; 413. Limit rod; 414. Fixed plate; 415. Limit block; 416. Fixed block; 5. Storage shell; 6. Air pump; 7. Oil pump; 8. Temperature control switch; 9. Alarm; 10. Nozzle; 11. Heat dissipation fins; 12. Semiconductor cooling chip. Detailed Implementation

[0034] The structure of this positive pressure ventilation explosion-proof device will be further described in detail below with reference to the accompanying drawings and embodiments of this utility model.

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments as described in this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0039] As per the instruction manual Figures 1-5 As shown, this utility model provides a technical solution:

[0040] A positive pressure ventilation explosion-proof device includes an insulated cabinet 1, a protective cabinet 2, a positive pressure ventilation explosion-proof cabinet 3, and a buffer mechanism 4; wherein:

[0041] The heat insulation cabinet 1 serves as an external enclosure, providing primary heat insulation and mechanical protection for the internal electrical control components;

[0042] The protective cabinet 2 is nested inside the cavity of the heat insulation cabinet 1, forming a second protective barrier;

[0043] The positive pressure ventilation explosion-proof cabinet 3 is located inside the protective cabinet 2. It maintains a positive pressure environment by continuously supplying clean air, effectively blocking external flammable gases from entering and fundamentally reducing the risk of explosion.

[0044] The buffer mechanism 4 is integrated into the inner cavity of the heat insulation cabinet 1 and matches the protective cabinet 2. It is used to achieve efficient shock absorption through a combination of mechanical transmission and fluid damping. Its specific structure includes buffer plates 41 fixedly connected in pairs to both sides of the protective cabinet 2. Two fixed shells 42 are symmetrically fixedly connected to the bottom of the two buffer plates 41 located below the two sides of the protective cabinet 2. A movable rod 43 is movably connected to the inner cavity of the fixed shell 42 through a rotating shaft. The other end of the movable rod 43 is movably connected to a movable shell 44 through a rotating shaft. A connecting block 45 is fixedly connected to the bottom of the movable shell 44. A pressing rod 46 is fixedly connected to one side of the connecting block 45. A piston 47 is fixedly connected to the other end of the pressing rod 46. A buffer cylinder 48 is provided on the outer surface of the piston 47. The inner wall of the buffer cylinder 48 abuts against the outer surface of the piston 47. The buffer cylinder 48 is fixedly disposed between the heat insulation cabinet 1 and the protective cabinet 2 and is fixedly connected to the heat insulation cabinet 1.

[0045] In the above description, when the buffer mechanism 4 is in use, the connecting block 45 drives the pressing rod 46 to push the piston 47 to reciprocate within the buffer cylinder 48. When external vibration or impact acts on the heat insulation cabinet 1, the buffer plate 41 converts the impact force into linear motion of the piston 47 within the buffer cylinder 48 through the movable rod 43. By utilizing the fluid damping effect to consume vibration energy, it effectively suppresses the repeated oscillation phenomenon that is prone to occur in traditional spring structures, and significantly improves the operational stability of the equipment.

[0046] In a preferred embodiment, such as Figure 1 , Figure 3 and Figure 4 As shown, the buffer mechanism 4 further includes a slide rod 49 slidably connected to the inner cavity of the movable shell 44. Both ends of the slide rod 49 are fixedly connected to positioning plates 410. The bottom of the positioning plate 410 is fixedly connected to the inner bottom of the heat insulation cabinet 1. A spring 411 is fixedly connected to one side of the movable shell 44. The other end of the spring 411 is fixedly connected to one side of the positioning plate 410. A limiting sleeve 412 is fixedly connected to one side of the movable shell 44. A limiting rod 413 is slidably connected to the inner cavity of the limiting sleeve 412. Both ends of the limiting rod 413 are fixedly connected to fixing plates 414. The bottom of the fixing plate 414 is fixedly connected to the inner bottom of the heat insulation cabinet 1. A limiting block 415 is symmetrically fixedly connected to one side of the buffer plate 41. The outer surface of the limiting block 415 is slidably connected to one side of the inner wall of the heat insulation cabinet 1. Fixing blocks 416 are fixedly connected to both sides of the fixed shell 42. The top of the fixing block 416 is fixedly connected to the bottom of the buffer plate 41.

[0047] In the above description, when the positive pressure ventilation explosion-proof cabinet 3 vibrates due to external impact, it drives the buffer plate 41 to press against the movable rod 43 through the protective cabinet 2. The movable rod 43 rotates via the pivot and pushes the movable shell 44 to move along the slide rod 49. During this process, the movable shell 44 compresses the spring 411 to produce elastic deformation. At the same time, the connecting block 45 drives the compression rod 46 to push the piston 47 to move slowly inside the buffer cylinder 48, using the fluid damping effect to consume vibration energy. The sliding fit between the limiting sleeve 412 and the limiting rod 413 can prevent the movable shell 44 from shifting. The sliding connection between the limiting block 415 and the inner wall of the heat insulation cabinet 1 further constrains the movement trajectory of the buffer plate 41. When the vibration decays, the elastic restoring force of the spring 411 drives the movable shell 44 to move in the opposite direction, so that the compression rod 46 and the piston 47 return to their initial positions. Through the dual action of mechanical transmission and fluid damping, the stability of the buffering process is significantly improved.

[0048] In a preferred embodiment, such as Figure 1 , Figure 3 Figure 4 As shown, a storage shell 5 is fixedly connected to the bottom of the heat insulation cabinet 1, an air pump 6 is fixedly connected to the top of the storage shell 5, an oil pump 7 is fixedly connected to the top of the storage shell 5 on one side of the air pump 6, and a temperature control switch 8 is installed on the top of the storage shell 5; an alarm 9 is installed on the top of the heat insulation cabinet 1, and two nozzles 10 are symmetrically arranged on the top of the heat insulation cabinet 1; several heat dissipation fins 11 are fixedly connected to one side of the inner wall of the protective cabinet 2 to enhance passive heat dissipation by increasing the heat exchange area; a semiconductor cooling chip 12 is embedded on one side of the heat insulation cabinet 1, which, combined with the feedback signal of the temperature control switch 8, can actively adjust the temperature inside the cabinet to a safe range.

[0049] When in use, the storage shell 5 serves as a basic support module, which can not only support actuators such as the air pump 6 and oil pump 7, but also connect to the positive pressure ventilation explosion-proof cabinet 3 and the nozzle 10 through pipelines, forming a complete functional chain of gas transportation, temperature control and emergency treatment, which significantly improves the environmental adaptability and safety of the equipment under complex working conditions.

[0050] Specifically, such as Figure 1 As shown, several nozzles are also provided on the nozzle 10 to improve the diffusion range and coverage density of the extinguishing medium by refining the fluid outlet.

[0051] Specifically, such as Figure 1 , Figure 3 and Figure 5As shown, the storage shell 5 is divided into two chambers. One chamber stores cooling oil, which is circulated to the heat dissipation fins 11 on the inner wall of the protective cabinet 2 by the oil pump 7, forming a liquid cooling heat dissipation channel. The other chamber stores high-pressure carbon dioxide gas, which is released through the nozzle 10 after being pressurized by the gas pump 6. This dual-medium storage design enables the storage shell 5 to simultaneously perform the functions of heat dissipation and fire extinguishing. Combined with the active temperature control capability of the semiconductor cooling chip 12, it constructs a comprehensive environmental control system that can cover daily operation and emergency situations.

[0052] In the above description, during the use of the positive pressure ventilation explosion-proof cabinet 3, the heat insulation purpose can be achieved through the heat insulation cabinet 1, reducing the influence of the external ambient temperature. Furthermore, the temperature control switch 8 (model REX-C900) can monitor the internal temperature of the protective cabinet 2 in real time. When the temperature is too high, the temperature control switch 8 automatically controls the oil pump 7 to operate. The oil pump 7 on the storage shell 5, in conjunction with the protective cabinet 2 and the heat dissipation fins 11, can perform heat exchange and cooling of the positive pressure ventilation explosion-proof cabinet 3 without affecting the positive pressure explosion-proof function. The oil pump 7 causes the cooling oil inside the first chamber to circulate within the protective cabinet 2. During this flow, it cooperates with several heat dissipation fins 11 to achieve heat exchange and cooling, improving the overall heat dissipation effect. The use of a semiconductor cooling chip 12 (model TEC1 series) can further enhance the heat exchange and cooling effect and extend its service life. During long-term use, the alarm 9, model JB-TG-XY400, can detect the interior of the heat insulation cabinet 1 in real time. In the event of a fire, it can promptly sound an alarm. Under the action of the alarm 9, the carbon dioxide gas inside the second chamber of the storage shell 5, which is divided into two chambers, can be automatically sprayed out through the nozzle 10 in conjunction with the air pump 6 to achieve the purpose of fire extinguishing. This makes the entire positive pressure ventilation explosion-proof device have a fire extinguishing structure, making it more practical. It should be noted that the above descriptions are all devices with relatively mature existing technology. Specific models can be selected according to actual needs, which will not be elaborated here.

[0053] The usage process and operating principle of the positive pressure ventilation explosion-proof device described in this utility model include:

[0054] Operating Procedure: When the positive pressure ventilation explosion-proof cabinet 3 vibrates due to external influences, the positive pressure ventilation explosion-proof cabinet 3 drives the buffer plate 41 to apply pressure to the movable rod 43. Subsequently, the movable rod 43 rotates through the pivot, and at the same time, it drives the movable shell 44 to move. The movable shell 44 compresses the spring 411 and, at the same time, compresses the compression rod 46 through the connecting block 45. The compression rod 46 pushes the piston 47 to move slowly inside the buffer cylinder 48, thereby buffering and absorbing the vibration of the positive pressure ventilation explosion-proof cabinet 3. When the positive pressure ventilation explosion-proof cabinet 3 stabilizes, the spring 411 will no longer have additional pressure and will drive the movable shell 44 to rebound, thereby driving the compression rod 46 and the piston 47 to move back to their original positions, improving the stability of the positive pressure ventilation explosion-proof cabinet 3 during the buffering process.

[0055] It should be noted that the components mentioned above, such as the heat insulation cabinet 1, the positive pressure ventilation explosion-proof cabinet 3, the air pump 6, the oil pump 7, the temperature control switch 8, the alarm 9, the nozzle 10, the heat sink 11, and the semiconductor cooling chip 12, are all devices with relatively mature existing technologies. The specific models can be selected according to actual needs. At the same time, the power supply for the positive pressure ventilation explosion-proof cabinet 3, the air pump 6, the oil pump 7, the temperature control switch 8, the alarm 9, the heat sink 11, and the semiconductor cooling chip 12 can be powered by the built-in power supply or by the mains power. The specific power supply method should be selected according to the situation, which will not be elaborated here.

[0056] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A positive pressure ventilation explosion-proof device, characterized in that Comprising: A heat-insulating cabinet (1), which is of a box structure; A protective cabinet (2), nested in the inner cavity of the heat-insulating cabinet (1); A positive-pressure ventilation explosion-proof cabinet (3), arranged in the inner cavity of the protective cabinet (2); A buffer mechanism (4), integrated in the inner cavity of the heat-insulating cabinet (1) and matching with the protective cabinet (2), including buffer plates (41) arranged on both sides of the protective cabinet (2). The bottom of the buffer plates (41) located below both sides of the protective cabinet (2) are rotatably connected to a movable shell (44) through movable rods (43). A connecting block (45) is arranged at the bottom of the movable shell (44). An extrusion rod (46) is arranged on one side of the connecting block (45). The other end of the extrusion rod (46) is provided with a piston (47). A buffer cylinder (48) is movably arranged on the outer surface of the piston (47). The inner wall of the buffer cylinder (48) abuts against the outer surface of the piston (47).

2. The positive pressure ventilation explosion-proof device according to claim 1, wherein, The buffer mechanism (4) further includes a sliding rod (49) slidably connected in the inner cavity of the movable shell (44). Positioning plates (410) are arranged at both ends of the sliding rod (49). The bottom of the positioning plates (410) is connected to the inner bottom of the heat-insulating cabinet (1).

3. The positive pressure ventilation explosion-proof device according to claim 2, wherein, A spring (411) is fixedly connected to one side of the movable shell (44). The other end of the spring (411) is fixedly connected to one side of the positioning plate (410).

4. The positive pressure ventilation explosion-proof device according to claim 1, wherein, The buffer plates (41) are arranged in pairs on both sides of the protective cabinet (2).

5. The positive pressure ventilation explosion-proof device according to claim 1, characterized in that, Fixed shells (42) are arranged at the bottoms of the buffer plates (41) located below both sides of the protective cabinet (2). The inner cavity of the fixed shell (42) is rotatably connected to a movable rod (43) through a rotating shaft. The other end of the movable rod (43) is connected to the movable shell (44) through a rotating shaft.

6. The positive pressure ventilation explosion-proof device according to claim 1, wherein The buffer cylinder (48) is arranged between the heat-insulating cabinet (1) and the protective cabinet (2) and is fixedly connected to the heat-insulating cabinet (1).

7. The positive pressure ventilation explosion-proof device according to claim 1, characterized in that, A limiting sleeve (412) is arranged on one side of the movable shell (44). A limiting rod (413) is slidably connected in the limiting sleeve (412). Fixed plates (414) are arranged at both ends of the limiting rod (413). The bottom of the fixed plates (414) is connected to the inner bottom of the heat-insulating cabinet (1).

8. The positive pressure ventilation explosion-proof device according to claim 1, characterized in that, Limiting blocks (415) are symmetrically and fixedly connected to one side of the buffer plate (41). The outer surface of the limiting blocks (415) is slidably connected to one side of the inner wall of the heat-insulating cabinet (1).

9. The positive pressure ventilation explosion-proof device according to claim 5, wherein Fixed blocks (416) are arranged on both sides of the fixed shell (42). The top of the fixed blocks (416) is connected to the bottom of the buffer plate (41).

10. The positive pressure ventilation explosion-proof device according to claim 1, wherein, A storage shell (5) is arranged on the inner bottom of the heat-insulating cabinet (1). An air pump (6) is arranged on the top of the storage shell (5). An oil pump (7) is arranged on the top of the storage shell (5) on one side of the air pump (6); and two spray pipes (10) are symmetrically arranged on the inner top of the heat-insulating cabinet (1). A heat dissipation fin (11) is arranged on one side of the inner wall of the protective cabinet (2). A semiconductor refrigeration sheet (12) is arranged on one side of the heat-insulating cabinet (1).

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